PFAVR is a port of pForth to the Atmel AVR architecture. Specifically, the ATmega64 and ATmega128 devices are supported on systems with at least 32K of external RAM. This is an interactive, interpreted Forth (not a native code compiler, not umbilical, not a CrossForth).

http://claymore.engineer.gvsu.edu/~steriana/Software

ForthSystems