BigFORTH
bigFORTH (executable name bigforth) is an interpreter and x86 optimizing compiler of the Forth language by Bernd Paysan. It has implementations for Linux and Windows (pre-beta). It obeys the ANS standard and comes with many libraries and bits of sample code, including a complete GUI framework called MINOS, and a form editor, Theseus.
BigFORTH is an implementation of Forth.
Other implementations of Forth.