EOS
The organizers, EOS (a Danish software house) choose a program committee which select and invite most of the speakers.
Since EOS are independent of commercial partners, members of the program committee are free to choose whom they like to invite. This independence allows us to attract great speakers and make a conference that we as developers would like to attend ourselves. That's the basic philosophy.
The JAOO System is licensed under the GPL. Source code is available on request.