Hyperica is a list of hypergrid destinations for Opensimulator with hundreds of articles in dozens of categories. Originally published by Maria Korolov of Hypergrid Business, Hyperica is now run by www.Outworldz.com, where you can find free content including free mesh items, OARs, free seamless textures, and many tutorials.
This is a list of all known public Hypergrids that are currently online. Click any item to go there via teleport.
A larger version with more fields is also available.