# User documentation

* [What is YunoHost](/whatsyunohost)
* [User interface](user_interface)
* [Configure an email client](/email)
* [Instant messaging usage](/XMPP)
* [Official applications](/apps)
   * [Baikal](/app_baikal_en)
   * [Firefox Sync](/app_ffsync_en)
   * [Tiny Tiny RSS](/app_ttrss_en)
   * [Transmission](/app_transmission_en)
   * [Radicale](/app_radicale)
   * [RoundCube](/app_roundcube_en)