GNU Forth is the Forth implementation of the GNU project. Binary distributions exist for many platforms such as DOS, Windows, Linux (all architectures), OS/2, and Mac OS X. GNU Forth uses GCC to compile a fast direct or indirect threaded Forth; GNU Forth is fully [Ans Forth] compliant. Authors of GNU Forth are AntonErtl, BerndPaysan, JensWilke, NealCrook, and others.
The most recent version of GNU Forth is 0.7.0, released in November 2008. It now uses the host gcc/linker to interface with C code, deprecating the previous ffcall interface.
The previous version of gforth was 0.6.2. It included an interface to C code via the ffcall library (though not enabled in the Windows build of gforth). Documentation on this feature