Optimizing Small memory C Compiler Assembler and Runtime for C64

A small C compiler

Watcom Disassembly Tool (wcdatool) - Tool to aid disassembling DOS applications created with the Watcom Toolchain

Tool to convert DOS Assembly code to C code

Build DJGPP cross compiler and binutils on Windows (MinGW/Cygwin), Mac OSX and Linux

flat assembler 1 - reconstructed source history

Small but useful 6502 assembler in ~3K lines of ANSI C code.