While Scheme is the primary language I am drawing inspiration from, I am intending to develop a new language to fit my specific purposes. Progress on this has been slow, for reasons unrelated to technical matters.
However, I do know of a number of other Lisp-based OS projects; I am aware of two currently on GitHub called
Mezzano (using standard Common Lisp) and
Chrsyalisp (which uses a mix of C and Common Lisp, as far as I can determine).
Also, if you go through the Wiki (including the page
Languages, naturally enough), you'll find a number of members past and present have used languages such as Ada, D, Rust, Go, Java, C#, FreeBasic, and Pascal - in addition to the inevitable Forth contingent, because Forth-based operating systems have had a quiet by highly developed following, especially in the embedded world, going back to the early 1970s. Some those of those languages have variant editions of the
Bare Bones tutorials for those who want to use them.
There's even a developer archetype,
Alta Lang, for OS devs who want to design their own language with which to implement their OS.