The Nexus is similar to the Vault. It contains modules, haks and other files for both NWN 1 and 2.
Neverwinter Nights 2 Character Builder:
This is a database with character builds for NWN 2, and allows you to make your own builds.
Camera Modes Demystified:
This is a guide for all those, who have problems with the camera in NWN 2.