World of Warcraft main site – You can find a long list of great addons that Blizzard approves of here on the main site. You can search by type and see a list of the addons and a description of what they do to help your toons out. You will find auction house addons, map coordinates, guild bank addons, and more here. This is a great way to find addons that you don't have to worry about Blizzard banning.

Curse Gaming – One of the most comprehensive addons lists on the web is on Curse Gaming. Everything that you could possibly want for your toons, including chess and other games that you can play with other WoWers is here. Broken down by category, and then listed by name, you will find ratings for each addon from players who have downloaded it and used it.

Curse Gaming is the best place to find addons for everything you can possibly think of, from auction house addons to enchanter's helpers to in WoW games to addons that will combine all your bags into one. There are so many addons here that it might actually be hard to figure out which ones you truly want.

WorldOfWar.net – Yet another great place to find wonderful addons that will help you improve everything about your toon, guild, and quests. You can find the latest addons here, and the site does a great job of ensuring that all the addons are the latest editions and will work with new patches that Blizzard has put out for the game. You'll find a complete breakdown of all the great things that each addon does for your toons, as well as how to set it up and instructions on using the addon. You can't go wrong with this site as they provide so much information that your brain will be on overload.