The Small Device C Compiler (SDCC), targeting 8-bit architectures
multi-platform cross assembler for 6502/6510/65816 cpu
Implementations for the Revised Report language
ATasm is a 6502 command-line cross-assembler.
Ada cross compiler and libraries for AVR µCs
Micro Programming Language - A Portable Language for Micro Computers
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
Supports writing Ada software for Cortex-M3, M4F boards
A C Compiler/Editor for Retro 6809 Machines (Colour Computer/Dragon)
AES-128 bit file encryptor
Ada compiler support for TI MSP430 processors
Mini Python Compiler written in Java