Server ideas for old boxes?

Hey guys!

So I have three boxes lying around I want to dedicate to pure servers. One is a super low powered Dual Core Duo I got for free, and the other two are i3 laptops one with 4gb of RAM and the other 8. I am using the first laptop as a FTP / NAS thing and the other two have nothing, and I was wondering what you guys could suggest for using them as. I was thinking the 8gb of RAM lappy as a game server but not too sure yet.

Thanks!

Throw XenServer or ESXi on them and turn it into a VM box for random servers? If the i3 can handle it, you could probably get away with two game servers and one extra box for whatever reason.

huh I didn't think of that, I'll look into it, thanks mate.