F- is an ANSish Forth that uses a VM generator to compile Forth into C-based VM suitable for living in a C-based (or assembly or HDL) microcontroller project. The VM supplies 32-bit math, I/O, multitasking and debugger in a ROM footprint as small as 4kB.
The OS561 operating system based around FORTH/Java. The OS is to run on a VHDL chip OpenHardware design called the Minon, but could become available for other platforms. The unique point of the design is a revolutionary data compression technology.