The Desktop Summit 2011 is a joint conference organised by the GNOME and KDE communities, in Berlin, Germany from the 6th August 2011 to the 12th August 2011 at the Humboldt University. Held annually in cities around Europe, GUADEC and Akademy are the world's largest gatherings of those involved with the free desktop or mobile user interfaces. Developers, artists, translators, community organisers, users, and representatives from government, education, and businesses and anyone else who shares an interest are welcome. GNOME and KDE are Free Software communities that drive the user interfaces of many GNU/Linux-powered devices, ranging from smartphones to laptops, or personal media centers. This year, for the second time, both communities have decided to organise a single, joint conference. We anticipate over a thousand participants, covering both projects as well as related technologies.