Štar: an iteration construct for Common Lisp
Štar is a concise and extensible iteration construct for Common Lisp which aims to be pleasant to use, easy to understand, fast if needed, general, and not to look like Fortran....
It is fun to make a cl:loop replacement. It is definitely overdone though. Lately I have been using https://git.sr.ht/~charje/loop to much enjoyment.