So if you and your team needs a voice server but can't afford vent servers and are tired of ventrillos shitty quality and the pings there is something better and it's called Mumble.
Mumble from my POV is way better than ventrillo, you can download it here:
Now your prolly thinking, ok where does the free part come in well this is it. GameUK offers free 50 slot Mumble servers no hidden costs, ITS ALL FREE! Signup at the link below and your server will be up in a matter of seconds.
Login to get your server details.
Once you connect with mumble if you want to gain access to admin, set your Username: SuperUser and the password is the one you set on gameuk. You'll now be able to add channels write restrictions and much more.
Some cool things about mumble:
You can see who is in your mumble server while ingame (CS, TF2, L4D .... everything)
You can also add your own avatar if you wish so you can know who it is.
Mumble is skinnable as you can see in picture 2 (Bad quality pic, looks much better on my screen)
Picture 2: http://i47.tinypic.com/29f5z68.jpg
And last thing if you'd like to visit our mumble channel: