3.5 D&D Greyhawk NPC Archive and Encyclopedia. The NPC Encyclopedia of the Flanaess. Compiled by Rick “ Duicarthan ” Miller. This four part Indexes of all the NPC’s of the Flanaess with Name Alignment Race/ Gender and Class/ Level the files are listed below in PDF format for easy usage.
Wealth-by-level, like experience-to-level and experience-awards-by-CR, is one of the few things in the core rules that's not OGL. It's an intentional holdout, done with the intention that any third-party designer who wanted to publish a d20 game would have to tell the playerbase to buy WotC books in order to get the key details.
![Level Level](http://blackmarches.wdfiles.com/local--files/character-advancement-and-wealth-by-level/Wealth%20by%20Level.jpg)
In practice, of course, the tables that aren't trivially easy to reproduce with simple mathematical formulas have still ended up being posted online everywhere, making the point somewhat moot.