wForth: A JavaScript Forth Interpreter

wForth is a JavaScript based Forth interpreter. It supports new Forth word creation, standard math operators on integer types only, parameter stack manipulation, infinite loops, do loops, pass data to and from the parameter stack to the return stack,  conditionals (if. then.else). as another example, wForth can interact with others aspects of the browser or to hook into Ajax calls to interact with servers.

munci

From munci’s homepage: Munci (pronounced “Monkey”) is an interactive macro-interpreted-compiling language inspired by Forth. As in Forth, functions written in Monkey can examine source code. Unlike Forth, Munci uses a generalized version of the Java tokenizer for input, so Munci programs can easily parse Java-esque code.

FIJI ForthIsh Java Interpreter

FIJI ForthIsh Java Interpreter, is written in Java and comes with full GPL’ed source. Running either at a command line or in an AWT window, FIJI accepts a syntax akin to the Forth programming language and uses a reference stack to push and pop all params to its functions. You can create Java objects and call methods on them from the FIJI stack. FIJI is very preliminary, quite incomplete and will be changing all the time. But such as it is, it works and has been tested on Linux Blackdown JVM 1.1.7a, VM/ESA JVM 1.1.4, and Windows/Sun JVM 1.1.7a.

Befunge Interpreter

Ok, call it obscure… At http://www.esolangs.org/wiki/Befunge we learn that “Befunge is believed to be the first two-dimensional, ASCII-based, general-purpose (in the sense of “you could plausibly write Hunt the Wumpus in it” [1]) programming language. Its form was influenced in part by the multimedia scripting application AmigaVision, and in part by Forth.” Here is the interpreter for it.