PropellerForth is a Forth kernel and interactive development environment for the Parallax Propeller. It is the first development environment to run on the Propeller itself.

PropellerForth is still in the early stages of development, but has already been used for some simple Propeller applications — and supports a number of advanced features.

PropellerForth was built using propasm, the open-source, cross-platform, standalone assembler for the Parallax Propeller.