Warcraft III: Reign of Chaos

Mmmm... Although it is not a freeware game. It's quite cheap these days.
It's popular. You can make maps into it, so you have something to share.

Friends and ladder system. Tournaments. And bla bla bla...
Would be cool :3

not to mention the aweomse 1vs1 hero action, that's what i love the most althoguh reccomending DotA is rather similar to reccomending this (but ofcourse this is a lot larger in gameplay)

Main is that an awesome game, addictive though, lol.
One of the things that makes it so good is the power to train your heroes and teach them abilities!
Also, it's probably better to focus on Free games

Hmm, this game was quite good, i played it a long time ago but i still love it. Possibly there could be a seperate forum for it.