jd-gui|1.4.0|A standalone graphical utility that displays Java source codes of .class files.|http://java.decompiler.free.fr/?q=jdgui
luyten|0.4.6|An Open Source Java Decompiler Gui for Procyon.|https://github.com/deathmarine/Luyten
procyon|0.5.30|A suite of Java metaprogramming tools focused on code generation and analysis.|https://bitbucket.org/mstrobel/procyon/
recstudio|4.0_20130717|Cross platform interactive decompiler|http://www.backerstreet.com/rec/rec.htm