http://asheron.info/~asheron/index.php/ACC_Wiki_Home - Very up-to-date Info about many ingame topics.
http://www.thejackcat.com:80/AC/ - Information about many In-game topics
http://www.acmaps.com/ - Information about dungeons and monsters
http://acheaven.buwahaha.com/ - Multiple 3rd Party Decal Programs