Superceded: My FCC project is a much more complete, robust, standard and optimized Forth for ARMv7 32-bit and x86_64.
This is a Forth implementation for ARM processors. It was written from scratch and as a hobby project. It is currently not in a working state.
Feel free to use it (BSD3 license), but expect bugs.
Contains a Makefile, just run make to build the core assembly code in forth.s. forth.fs contains the higher-level implementations of things like control structures.
You'll need make and the gcc suite, either running on or cross-compiling for ARM.
I've written and tested it on ARMv6, for the Raspberry Pi. I don't think it uses any v6-specific instructions, and it doesn't use the FPU, so it should be portable to other ARM cores.