GitHub - Bushmills/Bashforth: A Forth interpreter, entirely written as bash script. But by now is yoda (https://github.com/Bushmills/yoda) the better bashforth.

This Forth interpreter, entirely written as bash script, is a F³ (Fully Functional Forth), albeit a tad slow. Some would call it "sluggish". As rough indication, an ARM SBC which I'm running Bashforth on takes about 15 second for an empty loop of 100,000 iterations. It has built-in doc and see facilities, simplifying exploration of Bashforth. Bashforth lacks floating point support and vocabularies