Google Voice - Make cheap international calls with your Google number. Send free text messages.Place calls and send text messages showing your Google number. Listen to voicemail and read transcripts. Currently only available in the US. IMPORTANT: You must open Google Voice at least once after upgrading to route calls.
EQO (Java) FREE application that lets you call anywhere in the world for rates as low as 2.3 cents/minute. Plus, with EQO you get cheap text messages and free access to all your favourite instant messaging services like MSN, AIM, Yahoo!, Google Talk, ICQ