Very fast, multi-platform, full 32-bit Forth: 4 GByte flat address space, subroutine threading, runs on any Intel compatible CPU '386+'387 or more, and on DOS, Linux, Windows NT.
Very efficient Forth compiler, source code loosely based on Bill Muench's bForth. For Linux, Windows NT. Generated with the META program, a free metacompiler written in Forth. Free with iForth.