diff --git a/core/java/src/com/nettgryppa/security/package.html b/core/java/src/com/nettgryppa/security/package.html
new file mode 100644
index 0000000000000000000000000000000000000000..a15c85b54cf99ee82fc138e9bf0cfe5c90bef1e9
--- /dev/null
+++ b/core/java/src/com/nettgryppa/security/package.html
@@ -0,0 +1,7 @@
+<html>
+<body>
+<p>
+HashCash implementation. Unused.
+</p>
+</body>
+</html>
diff --git a/core/java/src/freenet/support/CPUInformation/package.html b/core/java/src/freenet/support/CPUInformation/package.html
new file mode 100644
index 0000000000000000000000000000000000000000..db1df9a5185bdebefea2fa45f5e43ab96bc773d9
--- /dev/null
+++ b/core/java/src/freenet/support/CPUInformation/package.html
@@ -0,0 +1,7 @@
+<html>
+<body>
+<p>
+CPUID implementaion, borrowed from freenet, updated and heavily modified
+</p>
+</body>
+</html>
diff --git a/core/java/src/gnu/crypto/prng/package.html b/core/java/src/gnu/crypto/prng/package.html
new file mode 100644
index 0000000000000000000000000000000000000000..4aeca8f65a5f744c55d402d4022bfbbc9872394e
--- /dev/null
+++ b/core/java/src/gnu/crypto/prng/package.html
@@ -0,0 +1,7 @@
+<html>
+<body>
+<p>
+The Fortuna PRNG from GNU Crypto, updated and modifed for I2P.
+</p>
+</body>
+</html>
diff --git a/core/java/src/gnu/gettext/package.html b/core/java/src/gnu/gettext/package.html
new file mode 100644
index 0000000000000000000000000000000000000000..cb5e0f8e6cc538c2e5c7b27904c9cef1922701a6
--- /dev/null
+++ b/core/java/src/gnu/gettext/package.html
@@ -0,0 +1,8 @@
+<html>
+<body>
+<p>
+GettextResource only, for ngettext().
+Called only from net.i2p.util.Translate, which is where everything except ngettext is implemented.
+</p>
+</body>
+</html>
diff --git a/core/java/src/org/bouncycastle/oldcrypto/macs/package.html b/core/java/src/org/bouncycastle/oldcrypto/macs/package.html
new file mode 100644
index 0000000000000000000000000000000000000000..56de5a39402f186a83c554dfe08f6220db614941
--- /dev/null
+++ b/core/java/src/org/bouncycastle/oldcrypto/macs/package.html
@@ -0,0 +1,14 @@
+<html>
+<body>
+<p>
+This is from some very old version of bouncycastle, part of package org.bouncycastle.crypto.
+Android bundled something similar in pre-Gingerbread, but upgraded to a later, incompatible version
+in Gingerbread. As of Java 1.4 these are in javax.crypto - more or less.
+To avoid having to make two different versions of our Android app, we rename to org.bouncycastle.oldcrypto.
+</p><p>
+Ref: <a href="http://docs.oracle.com/javase/1.5.0/docs/api/javax/crypto/package-summary.html">javax.crypto</a>
+and
+<a href="http://code.google.com/p/android/issues/detail?id=3280">this android issue</a>.
+</p>
+</body>
+</html>