WalkieTalkie VOIP

WalkieTalkie VOIP provides easy-to-use, low-latency, high-quality Voice-over-IP. It can be used to communicate between PCs, Macs, and iPhones/iPod touch(2g). Pick a username, and start calling. By using a 'locator' server, connections behind most routers can be easily brokered without opening ports. Conference calling between 3 or more parties is possible (with the desktop client hosting) as well.

Unlike other VOIP clients, call data doesn't bounce off a third party server, so latency is low. A 'locator' server is only used for exchanging connection information when calling by username. The author runs a public server, but
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Version 2.2.0:

• Allow calls over 3g/Edge.

Requirements

Compatible with iPhone, iPod touch (2nd generation), iPod touch (3rd generation), iPod touch (4th generation), and iPad. Requires iOS 2.1 or later