There are a bunch of other tools written in Lisp or Scheme: OpenMusic, PWGL, Symbolic Composer (no longer available it seems), ScoreCloud, Common Music, Common

There are a bunch of other tools written in Lisp or Scheme: OpenMusic, PWGL, Symbolic Composer (no longer available it seems), ScoreCloud, Common Music, Common Lisp Music, ... Opusmodus was supposed to have a Windows version in 'the future', but I don't know what plans are currently.