Psi+

Psi+: A great Instant Messenger software that also supports XMPP communication protocol

Psi+ is an instant messenger client that was created as an alternative to IM software that also supports XMPP (Jabber) communication protocol.

You will be guided through all of the steps of the installation, and at the end, you will have to make the account settings and tweak the config of the connection, and while the app isn't that different than other XMPP, you will have the possibility to organize entries into groups and it will show the number of friends that are online.

The application also comes with support for tabs that will make it easier to have multiple chat windows opened in a single window, while also being able to detach them.

Also offers a lot of flexibility when it comes to customization options, while also extended functionality is provided through plug-ins.

In conclusion, Psi+ is a handy Instant Messenger client that can be used to connect to any service based on the XMPP communication protocol, while also bringing a lot of flexibility when it comes to customization options and plug-in support.