VoIP services - Apps Rating

Skype is a software application that allows users to make voice and video calls and chats over the Internet. Calls to other users within the Skype service are free, while calls to both traditional landline telephones and mobile phones can be made for a fee using a debit-based user account system. Skype has also become popular for its additional features which include instant messaging, file transfer, and videoconferencing.

Viber is a mobile app that provides free international calls and text messages to other Viber users using 3G or Wi-Fi. Uses your existing contact list - check out which of your phone contacts and friends is already on Viber so that you can call and text them for free.

ooVoo brings easy video chat to all platforms - our free video chat app is available to download for your computer (Mac, PC), smartphone (iOS, Android) & tablet. ooVoo provides free group video calls with up to 6 people. Record and send video messages. Set up a web chat room for free

Google Voice is a telecommunications service. The service is configured and maintained by the user in a web-based application, styled after Google's e-mail service, Gmail. Google Voice currently provides free PC-to-PC voice and video calling worldwide between users of the Google Voice and Video Chat browser plugin

Google Talk is a freeware voice over Internet protocol (VoIP) client application. Available inside GMail. Google Talk mobile clients are also available for the Palm Pre, BlackBerry, Android-based devices and is preloaded on the Nokia N900 smartphone.

fring is a peer-to-peer mobile service enabling live chat, audio and video calls from mobile phones. fring technology is a Mobile VoIP based internet telephony service

Vonage is a commercial voice over IP (VoIP) network and SIP company that provides telephone service via a broadband connection.

Yahoo! Messenger is an instant messaging client and associated protocol provided by Yahoo!. Yahoo! Messenger offers PC-PC, PC-Phone and Phone-to-PC service, file transfers, webcam hosting, text messaging service, and chat rooms in various categories.

iChat is an instant messaging software application developed by Apple exclusively for its Mac OS X operating system. It has audio, video and screen-sharing capabilities as well as text messaging. It uses a XMPP-like protocol, Bonjour, for user discovery, and it also allows for LAN communication.

Jajah is a VoIP (Voice over IP) provider (by Telefónica). Jajah's primary service, Jajah Web, takes an approach called web-activated telephony, using VoIP to connect traditional phones (landline or mobile). Calls are made without download or user-installed software, and in most cases at rates lower than those of traditional phone companies or even free of charge.