The System Reference Document (SRD) is a comprehensive toolbox consisting of rules, races, classes, feats, skills, various systems, spells, magic items, and monsters compatible with the d20 System version of Dungeons & Dragons and various other roleplaying games from Wizards of the Coast.
- Official website
- Revised (v.3.5) SRD at Wizards of the Coast
- The Hypertext d20 SRD
- Sovelior & Sage html SRD
Note: NWN is based on DnD version 3.0, but the links above are for 3.5 (on which NWN2 is based).