WeBuzz Mobile messaging application compatible with MSN Messenger, Yahoo! Messenger and Google Talk
Papaya Papaya turns your phonebook into a fun and useful social network! It allows you to communicate with your friends cheaply and easily, no matter where you are
New Talkonaut Talkonaut(tm) is free mobile calling, VoIP enabled, Google Talk(tm) like application
Fring_call The HIGHEST QUALITY calls and group calls (voice and video) on mobile! fring's DVQ™ technology (Dynamic Video Quality) gives you the best video and audio quality possible by automatically and continuously adjusting your video call quality to match your connectivity
Qute Messenger for Java Qute is a cross-platform communication software that lets you make free phone calls, as well as send free text messages, voice messages and pictures. You can also enjoy fun group chats with friends all over the world
Skype (Official) Official skype for mobiles. Greetings, mobile fans, happy to share with you the exciting news that came out Lite version of Skype for mobile phones with support for Java 2.0 This version is supported by most phones out of the lineup Nokia, Sony Ericsson, Motorola, Samsung and LG
Talkonaut (J2ME) Talkonaut supports Jabber, Google Talk, ICQ, MSN, AIM and Yahoo networks both for chatting and voice calling
Talkatone app Talkatone is the best option for replacing your native phone to call and text for ... and Facetime are only free if the recipient has also already installed the app. The best voice calling apps for iPad that let you call all over the world, no actual phone needed!