All of the fleet lists included in the Battlefleet Gothic rulebook are represented in Praesidius Sector, as well as a few other fleets. These fleet lists have been extensively playtested by the gaming group for play balance and to test how true they are to that race's background. The new fleet lists we are using in our campaign include the following.
Please note that the Necron fleet list has not been typed up yet and will be added as soon as possible.
More races and fleets may be added as they appear in the sector, but these are the only ones currently being used. Note that these fleet lists are not official and that you should get the agreement of your gaming group before you use them in your campaigns.