Wikipedia
BarCamp
BarCamp is an international network of user-generated conferences primarily focused around technology and the web. They are open, participatory workshop-events, the content of which is provided by participants. The first BarCamps focused on early-stage web applications, and were related to open source technologies, social software, and open data formats.
The format has also been used for a variety of other topics, including public transit, health care, education, and political organizing. The BarCamp format has also been adapted for specific industries like banking, education, real estate and social media.