Welcome to Commalg (The Commutative Algebra/Algebraic Geometry Wiki). We've sort of just got started, so we're in a pre-pre-alpha stage. Most of the contents have been written by Vipul Naik, a Ph.D. student in Mathematics at the University of Chicago. There are currently about 300 articles.
We're in the process of preparing pages that'll help you guide yourself through the wiki. In the meantime, go ahead and use the links on the left-hand column to navigate the wiki, and learn more about searching the wiki at Help:Searching Commalg.
In the interim, Group Properties Wiki will give some idea of the directions in which this wiki is headed.
More in the same line: