Chat

• IRC (via Descent Valhalla)
• Kali.net, the hangout for D1/D2 chat and games

Forums

• DescentBB.com
• DescentBB.net
• DescentForum.de (German/English)
• Descent 3 ServerOps
• Facebook
• PlanetDescent.net

Missions

• D3 Fischlein
• Descent Missions Database
• Pooterman's