Skype - With the Skype app, you can make free Skype-to-Skype calls, and send and receive IMs for free, one-to-one or with a group. You can also call phones at Skype’s great rates – over WiFi or 3G.
To make calls to phones abroad, simply dial the number in Skype and pay with Skype Credit – or make unlimited calls with a subscription
Skype - Skype-to-Skype calls over 3G or WiFi ? Call phones abroad at great Skype rates ? Instant message one or many friends at the same time - Data plan or WiFi connection required (calling in U.S - WiFi only) - Some handsets (e
fringAndroidVersion: 188.8.131.52 updated Upload Date: 1 Mar 14
fring gives you FREE Video Calls, voice calls & chat to friends over 3G and WiFi (Video calls only on capable devices).
Communicate with friends in the fring network and other supported services: MSN Messenger, GTalk, Twitter, SIP, Yahoo!, AIM & ICQ
MobileVOIPAndroidVersion: 4.01 updated Upload Date: 14 Jun 13
MobileVOIP - With MobileVoip you can make free* voip calls from your mobile phone. Make calls to any country you desire at the cheapest rates. MobileVoip is currently supported on iPhones, Android phones and Symbian phones. Simply download the free MobileVoip app from one uour APP market and register with one of the supported Voip brands
CSipSimpleAndroidVersion: 0.02-03 updated Upload Date: 24 Jun 11
CSipSimple - This project will allow native sip for Android devices.
It relies on the pjsip sip stack and use the pjsip-jni project.
The use of this native library will ensure a better speed, call quality and less battery consumption than equivalent pure java projects