A complete runtime environment for gcc
The Small Device C Compiler (SDCC), targeting 8-bit architectures
multi-platform cross assembler for 6502/6510/65816 cpu
A minimalistic but complete standard Forth compiler in C
Scripts, Makefiles, tools helping to build TinyCC on Windows and wine.
C compiler and dev kit for the z80 with assembly language libraries.
Cross compiling environment to DJGPP v1
Building and running ancient Linux on Windows
EMX compiler hosted on Win32
Implementations for the Revised Report language
Open Watcom C/C++ compilers and tools Fork
Mariko's GCC for the x68000
ATasm is a 6502 command-line cross-assembler.
Cross compiling environment to DJGPP v2
Ada cross compiler and libraries for AVR µCs
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Supports writing Ada software for Cortex-M3, M4F boards
A kit for cross-platform & embedded development in modular languages.
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
Moved to https://github.com/davidgiven/ack