The GNU Prolog native compiler
BASIC Compiler and Interpreter
amforth is an extendible interpreter on microcontrollers
Prolog to C compiler with runtime for DOS, Windows and Raspbian
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
High-level, meta-language, trans-compiler with virutal machine
Open Utlity is series of unix utlity just like gnu for linux / windows
COBOL compiler for the PC x86-32 platform.