A free C, C++ and Fortran IDE
Rapid applications development tool and libraries for FPC
ECLiPSe Constraint Logic Programming System
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
C / C++ everything-memory debugger
Aspect Oriented Programming (AOP) for Erlang
Superseded by http://www.ti.com/tool/msp430-gcc-opensource