WowCardioRaid is an offline standalone parser for analyzing the wow combat log output.
It's not an Addon, but a full external application. So, dot not use CurseClient to get it, because this tool has nothing to do in the wow addon folder.

-launch the program
-load a WowCombatlog.txt file. Logs are located in the .\logs repertory of World of warcraft. To be able to read it correctly, wow must be closed, otherwise, you will not see the last events (wow, is opening this file in exclusive mode).
-watch and analyse the log in the graphic viewport
-You can Zoom and dezoom on the timeline, select time period, select spell or event. It basically shows everything
-You can see a stats breakdown for the selected period of time, or the whole log if nothing is selected.

It only works on windows. Sources are not currently included.
Main site of wowcardioraid: http://tixu.scribe.free.fr