Tox - Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

Psi-IM - Psi-IM is a messaging program that is designed for the XMPP network.

qTox - A Qt graphical user interface for Tox.

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.

Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.

Gajim - Full featured and easy to use Jabber client