Mega Flight Fares Search Engine

I'm looking for sites that can do a search for departure location anywhere in the world and arrival location anywhere in the world also.
But another thing added to this is that this site will do a search on ALL airlines that are availible for those destination I choose earlier and bring back all the prices for all the airliners they found.
I actually had a good site like this before in hand but it was in favourate and unfortunate I deleted it by accidient.
If you don't quite get what I'm talking about please check out this site that I found

http://www.travelocity.com
http://www.expedia.com/daily/home/default.asp

This site covers all the elements I want above.
I'm looking for more sites like this.
You will get 100 points for each site you find.