# XMPP, Extensible Messaging and Presence Protocol, is a communication protocol of instant messaging. YunoHost provide: * [Metronome](http://www.lightwitch.org/metronome): a XMPP server * [Jappix](/apps): a web XMPP client ## Heavy XMPP client You can use an heavy XMPP client such as [Pidgin](http://pidgin.im/), [Gajim](http://gajim.org/index.fr.html), [Jitsi](http://jitsi.org/) or [Adium](https://adium.im/). You will need to put your main e-mail address and your password.