Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full end-to-end encryption that supports prot ...

Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice ...

The goal of Gajim is to provide a full featured and easy to use Jabber client. Gajim works nicely with GNOME, but does not req ...

Hangouts is a messaging app that lets you send and receive messages, photos and more, and even start free video and voice call ...

Instantbird is an instant messaging client based on Mozilla XULRunner and the open source library libpurple created by the sof ...

ICQ is one of the oldest instant messengers. First developed by the Israeli company Mirabilis, sold to AOL, sold again and cur ...

Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Google Talk, AIM, Jabber, ICQ, ...

Adium is a free and open source instant messaging application for Mac OS X, written using Mac OS Xs Cocoa API, released under ...

Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You c ...

Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized ...

Psi is an instant messaging application for Windows, Linux, and Mac OS X that connects to the free, open XMPP network. Localiz ...

Linphone is an internet phone or Voice Over IP phone (VoIP). With Linphone you can communicate freely with people over the int ...

Nimbuzz offers limited availablility free calls and limited availability free text messaging for users via 3G and WiFi. Calls ...