RubyConf
Every year since 2001, Ruby Central, Inc. has produced RubyConf, the International Ruby conference. Attendance grew by a factor of ten between 2001 and 2006. RubyConf has provided a forum for presentations about Ruby technologies by their creators, including talks by Nathaniel Talbot on Test Unit, Jim Weirich on Rake, David Heinemeier Hansson on Ruby on Rails, Why the Lucky Stiff on the YAML library, and Sasada Koichi on YARV. Matz has attended, and spoken at, all the RubyConfs but one.
RubyKaigi