Make and receive phone calls and hold cross-platform webcam chats.
Keep track of Internet traffic volume.
Multi-protocol instant messaging client.
Bayesian spam filter for most email clients.
Hear, see, and chat with many people at a time.
Archive your e-mails in a database for later retrieval.
Brings Gmail to your desktop.
Instant messaging tool.
Video chat/calling tool; see up to 6 friends at once.
Block annoyances and reveal gems of twitter.
Minimalist IMAP client with multitouch gestures.
Initiate phone calls from your Mac through your iPhone.