Searching Rapidshare
One of the simplest tools that people use to share files is through Rapidshare. You just register into Rapidshare and post your file there, give the link to the one who needs this file and they can download it from Rapidshare. It is as simple as that.
This means that there could be gold over there in the system. There could be several files such as games, movies, interesting documents etc over there. If only you have a way of searching for them, then you could be hitting pay dirt.
That is where this Rapidshare Search engine Rapid4me comes in. It allows you to search the Rapidshare space and come up with the most relevant things for you.