A free C, C++ and Fortran IDE
The Open On-Chip Debugger
Portable version of the multifunctional development platform Eclipse.
Bug-fix-only libev port of shadowsocks
C/C++ function instrumentation (AOP, exception/stack tracing, GC)
A native Windows port of the GNU Compiler Collection (GCC)
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
C / C++ everything-memory debugger
Portable Pokémon Mini Emulator
C library, that logs memory changes made by malloc and free.
OpenCL logging and tracking tool
Superseded by http://www.ti.com/tool/msp430-gcc-opensource
Advanced Debugging Techniques in WinDbg
Universal programmer/debugger. Universal embedded software framework.