diff --git a/README.md b/README.md
index b95d853d1..06abba8f6 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ To get development branch from source control: https://geti2p.net/newdevelopers
   http://www.gnu.org/software/gettext/
 - Build environment must use a UTF-8 locale.
 
-### Build process
+### Ant build process
 
 On x86 systems do:
 
@@ -46,6 +46,20 @@ On non-x86, use one of the following instead:
 
 Run 'ant' with no arguments to see other build options.
 
+### Gradle build process
+
+Full builds of installers or updates are not yet possible, but the code can be
+compiled with:
+
+    ./gradlew assemble
+
+This will download dependencies over the clearnet by default, including Gradle
+itself. To download through a SOCKS proxy (e.g. Tor), add the following lines to
+your `~/.gradle/gradle.properties`:
+
+    systemProp.socksProxyHost=localhost
+    systemProp.socksProxyPort=9150
+
 ## Contact info
 
 Need help? See the IRC channel #i2p on irc.freenode.net
diff --git a/README.txt b/README.txt
index 31e99c234..c13095993 100644
--- a/README.txt
+++ b/README.txt
@@ -19,6 +19,16 @@ To build:
 	Run 'ant' with no arguments to see other build options.
 	See INSTALL.txt or https://geti2p.net/download for installation instructions.
 
+Gradle build system:
+	Full builds are not yet possible, but the command is:
+		./gradlew assemble
+
+	gradlew will download dependencies over the clearnet by default, including
+	Gradle itself. To download over Tor, create a gradle.properties file
+	containing:
+		systemProp.socksProxyHost=localhost
+		systemProp.socksProxyPort=9150
+
 Documentation:
 	https://geti2p.net/how
 	API: http://docs.i2p-projekt.de/javadoc/
diff --git a/apps/BOB/build.gradle b/apps/BOB/build.gradle
new file mode 100644
index 000000000..309b5768e
--- /dev/null
+++ b/apps/BOB/build.gradle
@@ -0,0 +1,12 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':apps:ministreaming')
+}
diff --git a/apps/addressbook/build.gradle b/apps/addressbook/build.gradle
new file mode 100644
index 000000000..184c59c9a
--- /dev/null
+++ b/apps/addressbook/build.gradle
@@ -0,0 +1,12 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':apps:jetty')
+}
diff --git a/apps/desktopgui/build.gradle b/apps/desktopgui/build.gradle
new file mode 100644
index 000000000..36f8eaaed
--- /dev/null
+++ b/apps/desktopgui/build.gradle
@@ -0,0 +1,13 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':router')
+    compile project(':installer')
+}
diff --git a/apps/i2psnark/build.gradle b/apps/i2psnark/build.gradle
new file mode 100644
index 000000000..23137a085
--- /dev/null
+++ b/apps/i2psnark/build.gradle
@@ -0,0 +1,43 @@
+apply plugin: 'war'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':apps:systray')
+    providedCompile project(':apps:ministreaming')
+    providedCompile project(':apps:jetty')
+}
+
+task i2psnarkJar(type: Jar) {
+    from sourceSets.main.output
+    exclude 'org/klomp/snark/standalone/**'
+    exclude 'org/klomp/snark/web/**'
+    manifest {
+        attributes 'Main-Class': 'org.klomp.snark.Snark'
+        attributes 'Class-Path': 'i2p.jar mstreaming.jar streaming.jar'
+    }
+}
+
+// TODO: standalone jar.  This is rather involved!
+
+artifacts {
+    archives i2psnarkJar
+}
+
+war {
+    into '.icons', {
+        from 'icons'
+    }
+    webInf {
+        into 'classes/org/klomp/snark/web'
+        from 'mime.properties'
+    }
+    webXml = file('web.xml')
+}
diff --git a/apps/i2ptunnel/build.gradle b/apps/i2ptunnel/build.gradle
new file mode 100644
index 000000000..527f5135b
--- /dev/null
+++ b/apps/i2ptunnel/build.gradle
@@ -0,0 +1,59 @@
+apply plugin: 'war'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+    test {
+        java {
+            srcDir 'java/test/junit'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':apps:ministreaming')
+    providedCompile project(':apps:jetty')
+}
+
+task i2ptunnelJar(type: Jar) {
+    from sourceSets.main.output 
+    exclude '**/ui/*.class'
+    exclude '**/EditBean.class'
+    exclude '**/IndexBean.class'
+    manifest {
+        attributes 'Main-Class': 'net.i2p.i2ptunnel.I2PTunnel'
+        attributes 'Class-Path': 'i2p.jar mstreaming.jar'
+    }
+}
+
+task tempBeansJar(type: Jar) {
+    from sourceSets.main.output
+    include '**/EditBean.class'
+    include '**/ui/*.class'
+    include '**/IndexBean.class'
+    baseName = 'temp-beans'
+}
+
+task uiJar(type: Jar) {
+    baseName = 'i2ptunnel-ui'
+    from sourceSets.main.output
+    include '**/ui/*.class'
+    manifest {
+        attributes 'Class-Path' : 'i2p.jar mstreaming.jar i2ptunnel.jar'
+    }
+}
+
+artifacts {
+    archives i2ptunnelJar, tempBeansJar, uiJar
+}
+
+war {
+    from 'jsp'
+    exclude 'jsp/web.xml'
+    webXml = file('jsp/web.xml')
+}
+
diff --git a/apps/jetty/build.gradle b/apps/jetty/build.gradle
new file mode 100644
index 000000000..ef13b9c2f
--- /dev/null
+++ b/apps/jetty/build.gradle
@@ -0,0 +1,34 @@
+archivesBaseName = 'jetty-i2p'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    ext.jettyVersion = '9.2.21.v20170120'
+    ext.tomcatVersion = '8.0.33'
+    compile project(':core')
+    compile 'commons-logging:commons-logging:1.0.4'
+    compile 'org.eclipse.jetty.orbit:javax.servlet.jsp:2.2.0.v201112011158'
+    compile 'org.eclipse.jetty:jetty-http:' + ext.jettyVersion
+    compile 'org.eclipse.jetty:jetty-io:' + ext.jettyVersion
+    compile 'org.eclipse.jetty:jetty-security:' + ext.jettyVersion
+    compile 'org.eclipse.jetty:jetty-server:' + ext.jettyVersion
+    compile 'org.eclipse.jetty:jetty-servlet:' + ext.jettyVersion
+    compile 'org.eclipse.jetty:jetty-util:' + ext.jettyVersion
+    compile 'org.eclipse.jetty:jetty-xml:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:apache-jsp:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-continuation:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-deploy:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-jmx:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-rewrite:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-servlets:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-start:' + ext.jettyVersion
+    runtime 'org.eclipse.jetty:jetty-webapp:' + ext.jettyVersion
+    runtime 'org.mortbay.jasper:apache-el:' + ext.tomcatVersion
+    runtime 'org.mortbay.jasper:apache-jsp:' + ext.tomcatVersion
+}
diff --git a/apps/jrobin/build.gradle b/apps/jrobin/build.gradle
new file mode 100644
index 000000000..5efcf77b9
--- /dev/null
+++ b/apps/jrobin/build.gradle
@@ -0,0 +1,11 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+}
diff --git a/apps/ministreaming/build.gradle b/apps/ministreaming/build.gradle
new file mode 100644
index 000000000..ee5001ea1
--- /dev/null
+++ b/apps/ministreaming/build.gradle
@@ -0,0 +1,32 @@
+apply plugin: 'java-library'
+
+archivesBaseName = 'mstreaming'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+    test {
+        java {
+            srcDir 'java/test/junit'
+        }
+    }
+}
+
+dependencies {
+    api project(':core')
+}
+
+configurations {
+    tests
+}
+task testJar(type: Jar) {
+    baseName = 'mstreaming-test'
+    dependsOn classes
+    from sourceSets.test.output
+}
+artifacts {
+    tests testJar
+}
diff --git a/apps/routerconsole/build.gradle b/apps/routerconsole/build.gradle
new file mode 100644
index 000000000..000fa5cc8
--- /dev/null
+++ b/apps/routerconsole/build.gradle
@@ -0,0 +1,39 @@
+apply plugin: 'war'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':router')
+    compile project(':installer')
+    providedCompile project(':apps:desktopgui')
+    providedCompile project(':apps:systray')
+    providedCompile project(':apps:jetty')
+    providedCompile project(':apps:jrobin')
+}
+
+jar {
+    manifest {
+        // Top level installer will rename to jrobin.jar
+        // DTG added in 0.8.4, not in the classpath for very old installs,
+        // before we changed wrapper.config to specify *
+        // very old installs don't have i2psnark,jstl,standard in the classpath...
+        // not added in WebAppConfiguration any more
+        // All new jetty 7 jars should have been in 0.9.6, added in 0.9.7
+        attributes 'Class-Path': 'i2p.jar router.jar jrobin.jar desktopgui.jar i2psnark.jar jstl.jar standard.jar jetty-continuation.jar jetty-http.jar jetty-io.jar jetty-security.jar jetty-servlet.jar jetty-servlets.jar jetty-util.jar jetty-webapp.jar'
+    }
+}
+
+war {
+    from 'jsp'
+    // Remove classes from the classpath, they are in the jar.
+    // If we return to precompiling jsps this needs to change.
+    classpath = []
+    webXml = file('jsp/web.xml')
+}
diff --git a/apps/sam/build.gradle b/apps/sam/build.gradle
new file mode 100644
index 000000000..c3bf372a7
--- /dev/null
+++ b/apps/sam/build.gradle
@@ -0,0 +1,17 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+    test {
+        java {
+            srcDir 'java/test'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile project(':apps:ministreaming')
+}
diff --git a/apps/streaming/build.gradle b/apps/streaming/build.gradle
new file mode 100644
index 000000000..45bd7e1ee
--- /dev/null
+++ b/apps/streaming/build.gradle
@@ -0,0 +1,20 @@
+apply plugin: 'java-library'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+    test {
+        java {
+            srcDir 'java/test/junit'
+        }
+    }
+}
+
+dependencies {
+    api project(':core')
+    api project(':apps:ministreaming')
+    testImplementation project(path: ':apps:ministreaming', configuration: 'tests')
+}
diff --git a/apps/susidns/build.gradle b/apps/susidns/build.gradle
new file mode 100644
index 000000000..103163af7
--- /dev/null
+++ b/apps/susidns/build.gradle
@@ -0,0 +1,20 @@
+apply plugin: 'war'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'src/java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    providedCompile project(':apps:jetty')
+}
+
+war {
+    from 'src/jsp'
+    from 'src/index.html'
+    webXml = file('src/WEB-INF/web-template.xml')
+}
diff --git a/apps/susimail/build.gradle b/apps/susimail/build.gradle
new file mode 100644
index 000000000..7cb5787fc
--- /dev/null
+++ b/apps/susimail/build.gradle
@@ -0,0 +1,27 @@
+apply plugin: 'war'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'src/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    providedCompile project(':apps:jetty')
+}
+
+war {
+    from 'src'
+    exclude 'WEB-INF/web.xml'
+    exclude 'LICENSE'
+    exclude 'src'
+    exclude 'susimail.properties'
+    webInf {
+        into 'classes'
+        from 'src/susimail.properties'
+    }
+    webXml = file('src/WEB-INF/web.xml')
+}
diff --git a/apps/systray/build.gradle b/apps/systray/build.gradle
new file mode 100644
index 000000000..035b394f0
--- /dev/null
+++ b/apps/systray/build.gradle
@@ -0,0 +1,12 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    compile files('java/lib/systray4j.jar')
+}
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 000000000..8ccdfd252
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,31 @@
+subprojects {
+    apply plugin: 'java'
+    apply plugin: 'eclipse'
+
+    repositories {
+        jcenter()
+    }
+
+
+    dependencies {
+        testCompile 'junit:junit:4.+'
+        testCompile 'org.hamcrest:hamcrest-library:1.3'
+        testCompile 'org.mockito:mockito-core:2.11.0'
+    }
+
+    jar {
+        manifest {
+            attributes 'Implementation-Version': '0.9.31-7'
+        }
+    }
+
+    sourceCompatibility = 1.7
+    // Set i2pBootClasspath=/path/to/rt.jar:/path/to/jce.jar in ~/.gradle/gradle.properties if needed
+    if (i2pBootClasspath) {
+        tasks.withType(AbstractCompile, { AbstractCompile ac ->
+            ac.options.bootstrapClasspath = files(i2pBootClasspath)
+        })
+    }
+}
+
+//apply from: file('gradle/update.gradle')
diff --git a/core/build.gradle b/core/build.gradle
new file mode 100644
index 000000000..5f37909d8
--- /dev/null
+++ b/core/build.gradle
@@ -0,0 +1,38 @@
+apply plugin: 'java-library'
+
+archivesBaseName = 'i2p'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+        resources {
+            srcDir 'java/src'
+            include 'gnu/getopt/*.properties'
+        }
+    }
+    test {
+        java {
+            srcDir 'java/test/junit'
+        }
+        resources {
+            srcDir 'java/test/junit'
+            include 'net/i2p/crypto/eddsa/test.data'
+            include 'net/i2p/crypto/eddsa/math/baseDblPrecmp'
+            include 'net/i2p/crypto/eddsa/math/basePrecmp'
+        }
+    }
+}
+
+configurations {
+    tests
+}
+task testJar(type: Jar) {
+    baseName = 'i2p-test'
+    dependsOn classes
+    from sourceSets.test.output
+}
+artifacts {
+    tests testJar
+}
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 000000000..63fe06e83
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,2 @@
+# Override these in ~/.gradle/gradle.properties if necessary
+i2pBootClasspath=
diff --git a/gradle/update.gradle b/gradle/update.gradle
new file mode 100644
index 000000000..fc4cdc391
--- /dev/null
+++ b/gradle/update.gradle
@@ -0,0 +1,78 @@
+task prepUpdateRouter(type: Copy) {
+    dependsOn ':core:jar', ':router:jar'
+    // Pass in paths as a closure, so they are not executed during configuration
+    from {[
+        project(':core').jar.archivePath,
+        project(':router').jar.archivePath
+    ]}
+    into 'pkg-temp/lib'
+}
+
+task prepUpdateSmall(type: Copy) {
+    dependsOn prepUpdateRouter
+    dependsOn ':apps:ministreaming:jar', ':apps:streaming:jar'
+    dependsOn ':apps:routerconsole:jar', ':apps:i2ptunnel:i2ptunnelJar'
+    dependsOn ':apps:routerconsole:war', ':apps:i2ptunnel:war'
+    dependsOn ':apps:addressbook:war'
+    // Base dir
+    into 'pkg-temp'
+    into('lib') {
+        from {[
+            project(':apps:ministreaming').jar.archivePath,
+            project(':apps:streaming').jar.archivePath,
+            project(':apps:routerconsole').jar.archivePath,
+            project(':apps:i2ptunnel').i2ptunnelJar.archivePath,
+        ]}
+        // pulled out of routerconsole.jar in 0.7.12, someday we can take out of updater
+        // name without version so we can overwrite if we upgrade
+        from('apps/jrobin/jrobin-1.5.9.1.jar') {
+            rename { 'jrobin.jar' }
+        }
+    }
+    into('webapps') {
+        from {[
+            project(':apps:routerconsole').war.archivePath,
+            project(':apps:i2ptunnel').war.archivePath,
+            project(':apps:addressbook').war.archivePath,
+        ]}
+    }
+}
+
+task prepUpdate(type: Copy) {
+    dependsOn prepUpdateSmall
+    dependsOn ':apps:BOB:jar', ':apps:sam:jar'
+    dependsOn ':apps:i2psnark:i2psnarkJar', ':apps:systray:jar'
+    //dependsOn ':apps:desktopgui:jar'
+    dependsOn ':apps:susidns:war', ':apps:susimail:war'
+    dependsOn ':apps:i2psnark:war'
+    // Base dir
+    into 'pkg-temp'
+    into('lib') {
+        from {[
+            project(':apps:BOB').jar.archivePath,
+            project(':apps:sam').jar.archivePath,
+            project(':apps:i2psnark').i2psnarkJar.archivePath,
+            // include systray changes in 0.7.5
+            project(':apps:systray').jar.archivePath,
+            // removed from updater in 0.9
+            //project(':apps:desktopgui').jar.archivePath,
+        ]}
+        // as of 0.7.12; someday, we can remove these from the updater
+        from 'apps/susidns/src/WEB-INF/lib/jstl.jar'
+        from 'apps/susidns/src/WEB-INF/lib/standard.jar'
+    }
+    into('webapps') {
+        from {[
+            project(':apps:susidns').war.archivePath,
+            project(':apps:susimail').war.archivePath,
+            project(':apps:i2psnark').war.archivePath,
+        ]}
+    }
+    from('history.txt') {
+        filter(org.apache.tools.ant.filters.HeadFilter, lines:1500)
+    }
+    doLast {
+        String more = '\n\n----------------\n\nEARLIER HISTORY IS AVAILABLE IN THE SOURCE PACKAGE'
+        ant.concat(more, append: 'true', destfile: 'pkg-temp/history.txt')
+    }
+}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 000000000..27768f1bb
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 000000000..92165eede
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.3-bin.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 000000000..cccdd3d51
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 000000000..e95643d6a
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/installer/build.gradle b/installer/build.gradle
new file mode 100644
index 000000000..469ff1134
--- /dev/null
+++ b/installer/build.gradle
@@ -0,0 +1,22 @@
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+}
+
+dependencies {
+    compile project(':core')
+    runtime files('lib/wrapper/all/wrapper.jar')
+}
+
+jar {
+    baseName 'utility'
+    from project(':core').sourceSets.main.output
+    include 'net/i2p/installer/**'
+    include 'net/i2p/util/FileUtil.class'
+    manifest {
+        attributes 'Main-Class': 'net.i2p.installer.Main'
+    }
+}
diff --git a/router/build.gradle b/router/build.gradle
new file mode 100644
index 000000000..e38bb9688
--- /dev/null
+++ b/router/build.gradle
@@ -0,0 +1,26 @@
+apply plugin: 'java-library'
+
+sourceSets {
+    main {
+        java {
+            srcDir 'java/src'
+        }
+    }
+    test {
+        java {
+            srcDir 'java/test/junit'
+        }
+    }
+}
+
+dependencies {
+    api project(':core')
+    testImplementation project(path: ':core', configuration: 'tests')
+}
+
+jar {
+    manifest {
+        // so people with very old wrapper.config files will still work with Jetty 6
+        attributes 'Class-Path': 'jetty-i2p.jar jetty-java5-threadpool.jar jetty-rewrite-handler.jar jetty-sslengine.jar jetty-start.jar jetty-util.jar'
+    }
+}
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 000000000..580063a4c
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,17 @@
+include 'apps:addressbook'
+include 'apps:BOB'
+include 'apps:desktopgui'
+include 'apps:i2psnark'
+include 'apps:i2ptunnel'
+include 'apps:jetty'
+include 'apps:jrobin'
+include 'apps:ministreaming'
+include 'apps:routerconsole'
+include 'apps:sam'
+include 'apps:streaming'
+include 'apps:susidns'
+include 'apps:susimail'
+include 'apps:systray'
+include 'core'
+include 'installer'
+include 'router'