TweetChirp PocketPC 2003 - Windows Pocket PC 2003 Second Edition

TweetChirp PocketPC 2000 - Windows CE (Pocket PC) or Windows Pocket PC 2002 Windows or Pocket PC 2003 (no emulator required)

TweetChirp Legacy - Windows CE (HPC Pro - PsPC - Pocket PC - Pocket PC 2000) or Windows Pocket PC 2002 or Windows Pocket PC 2003 (with emulator msvbppc.armv4.cab)

TweetChirp DeskTop - Windows 95 / 98 / 98 SE / 2000 / XP / Vista

TweetChirp Palm - Palm OS 5.2 or Higher