Unfortunately Skype isn't a good choice for CPU-intensive game such as League of Legends; group talk causes significant and noticeable delays during play. Is there a more lightweight solution I can use for talking to my team?
closed as off topic by Arda Xi, Mad Scientist, Oak♦, Bora, Raven Dreamer♦ May 29 '11 at 15:45
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Unfortunately I don't know whats the most lightweight application, but here are four I know of that aren't Skype.
I know the most about Ventrilo and Mumble, little about Teamspeak and nothing about Mohawk. I definitely prefer Mumble over ventrilo. The general consensus is that Mumble has better delay and voice quality over Mumble.
Some one will have to set up a server for any of these programs. Ventrilo's server has a seperate download and is limited to 10 (I think?) people at a time. Mumble comes in the same download as the client and is limited to what you set it to. If you get either of those two you'll want to modify a few settings in the server config, but other than that it's easy to set up.
I use Google Talk, the Windows desktop client is super light. The audio quality is generally pretty good as well. I'm not 100% sure the desktop client allows more than 2 people to chat though. I believe the web version does but I haven't tested it.