Well, I don't know if this qualifies as useful, but I wrote a minimal roguelike in one page of Forth last year: https://asciinema.org/a/672405 https://asciinema

Well, I don't know if this qualifies as useful, but I wrote a minimal roguelike in one page of Forth last year: https://asciinema.org/a/672405 https://asciinema.org/a/672405 vdupras is here in the comments today. He's written a self-hosting interactive operating system in Forth, including a FAT16 filesystem and everything, and a compiler for a useful subset of C: https://duskos.org/ https://duskos.org/