The Small Device C Compiler (SDCC), targeting 8-bit architectures
Binary executable decompiler
Open Watcom C/C++ compilers and tools Fork
multi-platform cross assembler for 6502/6510/65816 cpu
MinGW GCC cross development environment for ARM.
Implementations for the Revised Report language
MinGW GCC cross development environment for Power PC.
Mariko's GCC for the x68000
Cross compiling environment to DJGPP v1
EMX compiler hosted on Win32
MinGW GCC cross development environment for M68K.
Full Pascal and Assembly language tool chain for Texas Instrument TI-
ATasm is a 6502 command-line cross-assembler.
Cross compiling environment to DJGPP v2
Ada cross compiler and libraries for AVR µCs
An open source ecosystem for IoT development
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
C to Pascal converter to port math routines in Lazarus/Delphi.
Embed C++ in Python source code, dynamically compile and access data
Dual-target(32 & 64-bit) MinGW-W64 compilers for 32 and 64-bit windows