Echofon Pro for Twitter
My favorite Twitter app.
Download
IM+ Pro
This app offers instant messaging for Facebook, MSN, Yahoo, Google, AOL, MySpace, Twitter and ICQ. It’s the most versatile chat client I’ve ever used.
Colloquy – IRC Client
This is a great IRC chat client.
Download
Skype for iPhone
This allows for voice, video and text chat. This is the leading company for voice-over-ip.
Download
Nimbuzz Messenger
Free multi-IM client. Supports MSN, Yahoo, Facebook, MySpace, Google, AIM and ICQ.
Tango – Free Video Call, Voice and Chat
Tango Video chat.
Download
Talkatone with free group SMS messaging & WiFi VoIP Calls
Make free phone calls (requires a Google Voice account).
