Movim is a decentralised social network, written in PHP and HTML5 and based on the XMPP standard protocol.

Movim is a web-based Jabber (XMPP) client, which also exposes a social network functionality using standards-conformant PubSub functionality. It supports microblogging (both “private” posts, i.e. shown only to one’s Jabber contacts, and “public” ones, which are indeed publicly available, including an RSS feed and a web interface showing all public blog posts of a user), communities, etc.

Movim is a client, that means it still requires a Jabber/XMPP server to function. https://github.com/movim/movim/wiki#xmpp-servers contains upstream documentation on how to best configure your server to work well with Movim. A Movim installation (“pod”) can allow users of one or multiple Jabber servers to log into that pod; users of other Jabber servers will need to install their own Movim instance.