ATasm is a 6502 command-line cross-assembler.
SUNY Stony Brook Pascal for the IBM/360 written in XPL
build linux from termcap to GTK-4.7 100% non-stop
Supports writing Ada software for Cortex-M3, M4F boards
Embedded linux and cross toolchain
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
Linux to DJGPP cross-compiler with pthread library and std::thread.
BASIC Compiler and Interpreter
GCC-based bleeding-edge-toolchain for bare-metal ARM microcontrollers
http://www.slideshare.net/gdelaportas/alpha-script-concept
Building and running ancient Linux on Windows
C/C++ Compiler for the ActionScript Virtual Machine (AVM2)
Build System for FLDIGI Applications
Java-based Dialect of the Unicon Programming Language