Dusk OS is a 32-bit Forth operating system similar to Collapse OS, but more ambitious in its targets and capabilities. Dusk OS is designed to operate on modern, reclaimed machinery in situations where the production of new computers is disrupted. It prioritizes extreme simplicity, currently only about 10,000 lines of code. It is designed to port existing software written in C, using its own DuskCC "Almost C" compiler.

Dusk OS is currently a work in progress, but is under active development.