Books
Most of the 3.5e and several 3.0e rulebooks and d20 expansions have been uploaded to a Google Drive for referencing:
Core Rulebooks
- Player's Handbook I - All the basics you need to create and maintain a character.
- Player's Handbook II - New classes, spells, and feats. How to respec an old character, group tactics.
- Dungeon Master's Guide I - In-depth rules and clarifications, how to murder players' characters.
- Dungeon Master's Guide II - Campaign creation, designing prestige classes, magic items.
- Monster Manual I - Stats for all the classic monsters, plus a bunch of random other stuff.
Class Extensions
- Complete Adventurer - Skills, feats, and prestige classes for everybody.
- Complete Arcane - an in-depth look at how to access traditional arcane magic and use that power to a character's advantage.
- Complete Champion - focuses on the divine champion and provides new rules options for characters who enjoy battling for a cause, defeating foes with divine magic, and going on quests that mean more than simply defeating the bad guy and grabbing the treasure.
- Complete Divine - an in-depth look at how to gain the favor of the gods and use that power to a character's advantage.
- Complete Mage - In addition to providing the definitive treatise on arcane magic, Complete Mage expands the character options available to users of arcane magic, including bards, sorcerers, wizards, assassins, warlocks, and wu jen.
- Complete Psionic - This companion to Expanded Psionics Handbook builds on the existing psionics rules and presents exciting new options for psionic characters and psionic “dabblers.”
- Complete Scoundrel
- Complete Warrior - an in-depth look at combat and provides detailed information on how to prepare a character for confrontation.
- Defenders of the Faith - Clerics and Paladins
- Expanded Psionics Handbook
- Magic of Incarnum
- Masters of the Wild - Barbarians, Druids, and Rangers
- Song and Silence - Bards and Rogues
- Sword and Fist - Fighters and Monks
- Tome and Blood - Wizards and Sorcerers
Race Extensions
- Races of Ansalon
- Races of Destiny
- Races of Eberron
- Races of Faerun
- Races of Renown: Fang and Fury
- Races of Stone
- Races of the Dragon
- Races of the Wild
- Savage Species
Lore and Settings
- Deities and Demigods
- Draconomicon
- Dragons of Faerun
- Drow of the Underdark
- Eberron Campaign Setting
- Forgotten Realms - Lords of Darkness
- Forgotten Realms - Underdark
- Forgotten Realms - Mysteries of the Moonsea
- Frostburn - Mastering the Perils of Ice and Snow
- Ghostwalk
- Libris Mortis
- Manual of the Planes
- Planar Handbook
- Cityscape
- Dungeonscape
- Elder Evils
- Exemplars of Evil
- Sandstorm - Mastering the Perils of Fire and Sand
- Stormwrack - Mastering the Perils of Wind and Wave
More Monsters
- Monster Manual II - Gem dragons, a few classics that were left out in the first manual, and lots of other new creatures.
- Monster Manual III - Mostly expanding on classic types (trolls, giants, dinosaurs, etc).
- Monster Manual IV - Lots of Drow material, elementals, and Spawns of Tiamat.
- Monster Manual V - Lots of illithid stuff.
- Fiendish Codex I - Hordes of the Abyss
- Fiendish Codex II - Tyrants of the Nine Hells
- Lords of Madness
- Fiend Folio
Items, Weapons, and Equipment
- Arms and Equipment Guide
- Magic Item Compendium
- More Ultimate Equipment
- Tome of Battle
- Weapons of Legacy