Puredata http://puredata.info is an open source tool for programming multimedia works. Much of its development results from a community effort of developers worldwide, who have organized conventions.
The first convention http://puredata.info/community/projects/convention04 took place in Graz, Austria. The second in Montreal http://pure-data.ca/en. With the support of CCSL, the Third International Puredata Convention - PdCon09 http://convention.puredata.info - will take place in São Paulo (july 19th-26th, 2009), with the intent to promote interchange and local development. The format includes the presentation of artistic works, academic works, discussion regarding the interests of the community, and various courses. Submisssions deadline is March 29th, 2009.
Visit http://convention.puredata.info and submit your work!