FOSS4G is the global conference for Free and Open Source Software for Geospatial, organized by the Open Source Geospatial Foundation (OSGeo). In 2013, FOSS4G will be held in in the United Kingdom for the first time, at the East Midlands Conference Centre in Nottingham, from 17th to 21st September.
FOSS4G 2013. Registration is now open!