Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Psi-IM - Psi-IM is a messaging program that is designed for the XMPP network.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Gajim - Full featured and easy to use Jabber client
Palringo - Palringo is a cross – platform instant messaging client with which you can communicate with your contacts from MSN, Gmail, Yahoo MSN, AOL, Jabber or ICQ at the same time.
Cotap - Cotap is a simple, secure mobile messaging app for fast, easy workplace communication.