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
GDB pretty printers for boost
C library, that logs memory changes made by malloc and free.
A library for monitoring the garbage collection of app objects
Superseded by http://www.ti.com/tool/msp430-gcc-opensource