Which games have private servers?

Hi everybody. I want to make a private server in one of my PCs, but I don't know all the games that I can choose for that. I only know Mu online, Wow, lineage 2.. ragnarok... nothing else.

Can you help me and tell me what other games are available to make private servers?

I mean, that the server files can be found in the internet for free, and works correctly.. etc.. no money. Same for the client.

My english use to be good, but I don't know how to put it this time.. (a question of complicated translation)

Hope you understand.

Thank you very much!

if you scroll down on the main forum page there letters like A-f or whatever it is
all of thse are games whichs have/will have private servers.