World of Logs is a World of Warcraft combat log parsing site. SMTR has a paid account on there, holding records of our raids going back to early 2010. You may access our guild page via
http://www.six-minutes.com/WoL.
Expression Editor
There is a great
guide to the World of Logs Expression Editor in their forums. This explains how to get extremely detailed information about what happened during the raid. You can see who failed at what mechanics, what a player's rotation was, who the healers were healing, what killed people, and more.