Here you can find Diablo 2 information and character overviews:
Hosted Material:

Class Listings
 Magic Find Table
 Jarluf's Damage Calculations
 Necromancer Damage Calculator

Linked Material:

Chippydip's LOD Character Planner
 Diabloii.net
 Arreat Summit
 The Lurker Lounge
 Planet Diablo
 Diablo II Sector