EsoIDE
Interpreter and debugger for various esoteric programming languages
EsoIDE will be a collection of various esoteric programming language interpreters sharing a common front-end GUI/debugger.
Current languages with interpreters under development or planned for development include Brainf**k (implemented), Befunge-93, Chef, and Fractran.
Want to contribute an interpreter or UI ideas? Feel free to fork the code and submit your own changes!