Bluespec Compiler (BSC)
A free C, C++ and Fortran IDE
Binary executable decompiler
Structure-routed visual compiler: recognize and automate GUIs in YAML
A whole-program optimizing compiler for Standard ML
an object-oriented language with late binding
A minimalistic but complete standard Forth compiler in C
The regex-centric, fast lexical analyzer generator for C++
Action! - The Native Programming Language for Atari 8-bit Computers
Pitml Xstream is an open source compiling software for Web Development
A nice program that allows you to make your own database applications.
Convert your Arduino C/C++ code to Assembly code.
small console GML or graphviz DOT graph viewer
Best IDE for Beginners
An open source Java decompiler Gui for Procyon
Pascal XE is an easy to use IDE for Pascal programming.
grieferCode
Electronic design and programming tools suite like Eagle, MpLab