A VoIP application.
http://www.goteamspeak.com/news.php
teamspeak is not open source.
see also community-wiki: teamspeak
Download teamspeak. There is also an unofficial client for mac.
The difference to most other of its kind:
- teamspeak can be configured to good old push-to-talk, known from citizen band. You only hear what others want to make you hear. It is therefore much less dominant in combination with a collaborative editor session. When nobody pushes the button there is silence.
linux_users: listen to different applications while using Teamspeak