Need a VOIP program that works well

[mazeroth]

Can anyone recommend a killer VOIP program my friends and I can use while playing games? My brother uses Team Speak (I think that's the name) but said you had to pay for a server to use it. Are there any free ones out there that work reasonably well?

Thanks!

 

[Schadenfroh]

Skype is a nonserver based VOIP that is nice, but you are capped at 5 people.