With the exception of maybe one or two people, I wouldn't consider anyone here my friend.
However, on another, smaller, political debate forum I used to spend huge amounts of time on discussing deep issues -- I'd consider those people really good friends. Really good friends, because you can't really talk about a lot of that stuff in real life.
EDIT: I'm sure people who spend lots of time have that connection with other people here. But I, personally, don't spend that much time here.
I think the Hitchhikers Guide to the Galaxy text based adventure is legally free. That game is really funny -- written by Douglas Adams himself, although you'll need a FAQ to get through it.
As far the more legally ambiguous abandonware is concerned (really old games nobody cares about; which what people are normally talking about when they say abandonware), I'd check out the original Lemmings, Wolf (or Lion), Commander Keen and Jazz Jackrabbit.