TclForth - A multi-platform Forth based on Tcl/Tk.

TclForth uses Tcl as its native language. The Forth code and colon words are compiled to Tcl procedures that pass arguments and results on a stack. The stack items are handled as local variables. Forth and Tcl procedures coexist in the Tcl namespace and are all taken care of by the Tcl runtime system. Thus, the Tcl bytecode interpreter is also the inner interpreter of Forth. For details see

I have built applications with TclForth for a while and released it as an open source project - now updated to V0.7.0. The system is prepared as self-contained double-click executables for Windows and OS-X and as a set of source files for Tcl in Linux and elsewhere. Installation = unzip. TclForth programs run unchanged in Windows, OS-X, Linux, and more. Get it at

The illustrated chess-moves game was published in the Tcl'ers Wiki. I converted it to TclForth as a fun non-trivial test and proof of concept. The game is included in the release.