3E and 3.5E Dungeons and Dragons

• 3.5E changes from 3E D&D
• 3.5E system reference documents:
  • Hypertext d20 3.5E SRD (html - not bad)
  • Sovelior and Sage (html - great!)
  • Wizards of the Coast (rich text - annoying!)
  • other formats
• D&D Game Rule FAQs
• Glenn's house rules; Mystaran Elves - in the Norse campaign Elves may choose the Magical Training feat and don't get trance
• Hannes' house rules
• index files for D&D 3.5
• Monte Cook - rule modifications, his comments, and explanations from a 3E designer
• NPC generator for 3.5E D&D
• PCGen, a software generator for characters
• Planescape
• treasure generator
• treasure generator by encounter level

Classifications of species, which may be helpful for world designers
The Evolutionary Tree. And another one with the phylums. One with more useful details. And yet more on phylogeny. Still more on evolutionary groupings.

Online roleplaying resources
HarnMaster
HeroMachine, for character portraits
WebRPG: online gamer community, (includes a nice list list of connections to various RPG sites under game links).
Roleplaying guides and more, Uncle Figgy.
Vampyre, Werewolf and more - Whitewolf's online information including FAQs and character sheets.

Collectable card games
Wizards of the Coast (including web pages on Magic The Gathering and TSR AD&D products).

Tarot
Correspondences between Tarot variants.
An online tarot deck with pictures.
Elemental dignities

Names

• etymology of angels and angels' names
• Dan Smith's fantasy fonts
• Italian surnames and English equivalents
• names and their meanings
• random name generator

Random other stuff that may interest roleplayers

• Infiltration with links to sites with pictures of modern ruins and more

Software

• Fantasy Grounds for roleplaying across the net
• Irony Games' map makers - from world scale to villages and dungeons
• OpenRPG for roleplaying over the internet, and miniatures for it
• random dungeon generator