Zandronum is a free open-source advanced multiplayer sourceport capable of running various games such as Doom, Doom II, Final Doom, Heretic, Hexen, and as well as others online. It originated from Skulltag, which was based on ZDoom and its counterpart, GZDoom.
This is the demo version of Pyrobolum's Doom. Please notify me of any bugs. Thanks. The maps contained are: MAP01 MAP02 MAP03 MAP04 MAP05
1) Yes, it can run Brutal Doom.
2) Yes, it can use Freedoom as a source.