A reverse engineering suite (decompiler, editor, debugger and more)
Dex to Java decompiler
Learn Java the easy way!
JPHP - an implementation of PHP on Java VM
Java Bytecode Viewer & Decompiler
HATE's an ASN.1 Text Editor.
Pure Trait-based Programming on the Java Platform
android app for CodePad.org & ideone.com
A Java Decompiler with a catchy name.
Adobe Flash SWF file reader, editor