Starbow is based off of Starcraft 2 and not Brood War. So content that is fairly similar for both games are on this list and not on the Brood War list. If it is in Starcraft 2 but not on this list, it is not in the game.
A list of things from Starcraft 2[]
Protoss[]
Probe :)
Chronoboost
Zerg[]
Viper (modified)
Ultralisk (no splash)
Terran[]
Reaper (modified)
Add-ons