Here is a general overview of each section:
Rulebooks LORE FORGOTTEN REALMS – List of rulebooks by edition (3.0/3.5) as well as core vs. supplement vs. campaign setting.
Character Options 3RD EDITION FEATS – Classes, Feats, Feat Categories, Skills, Flaws, Traits, Skills, Skill Tricks, Deities, and Languages DND
Magic – Spells, Schools, Descriptors, Domains and coming soon – Shadow Casting, Invocations, Psionics, Auras and Maneuvers
Bestiary – Races, Race Types, Monsters and coming soon – Monstrous Types, Monstrous Traits and Templates
Items – Magical and coming soon Mundane/Alchemical