Teamspeak is a great application to have around for keeping your hands free of typing while trying to chat with a group of people. All you need is a mic and some speakers, or a headset. This app is mostly used for gaming, but can be used for groups of virtually unlimited amounts of people, as long as you are NOT selling slots on the server. You can also license the software which allows you to do so, but we are pimping the fact that you can use this for talking to large amounts of people as long as you have the right codec set, or bandwidth available. I personally have been using Teamspeak for over 8 years, and it has always satisfied my needs for communication with my gaming friends and other friends online. It is much less commercialized than Ventrilo, and therefore makes my list of favorite files. It is more of an app for the community.