Michael from Angel Barracks has some rather cool 6mm creatures he just released for his new 6mm line. Angel Barracks also carries Plasma Blast Games figures and Dark Realm Miniatures.
Michael also has the
FUBAR Sci-Fi ruleset. The rules consist of a one page document, which is fast playing and is designed for small unit actions in a modern or Sci-fi setting.
rules are simple to learn (usually after about 15 minutes of play) yet
have enough tactical complexity to give you a fun and challenging game.