Decompiler from Java bytecode to Java, used in IntelliJ IDEA
A reverse engineering suite (decompiler, editor, debugger and more)
A decompiler for Lua 5.x
Learn Java the easy way!
Transcribe Parsing Expression Grammar into a parser written in Java.
HATE's an ASN.1 Text Editor.
Parser Generator based on Coco/R
Simple Data Fix Language
Mini Python Compiler written in Java