The Small Device C Compiler (SDCC), targeting 8-bit architectures
A complete runtime environment for gcc
BASIC Compiler and Interpreter
C compiler and dev kit for the z80 with assembly language libraries.
Implementations for the Revised Report language
PEARL Compiler and Runtime System
Oberon family of languages to C translator for ARM, x64 and x86 archit
Mariko's GCC for the x68000
Scripts, Makefiles, tools helping to build TinyCC on Windows and wine.
EMX compiler hosted on Win32
A minimalistic but complete standard Forth compiler in C
SUNY Stony Brook Pascal for the IBM/360 written in XPL
Cygwin cross-compiler for Fedora
Ada cross compiler and libraries for AVR µCs
K&R C compiler for the 68000
A "Just Enough Language" compiler targeting the 6502/Z80/6809
Micro Programming Language - A Portable Language for Micro Computers
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)