From the SeaGL main page:

"SeaGL is a grassroots technical conference dedicated to spreading awareness and knowledge about the GNU/Linux community and free/libre/open-source software/hardware. Our goal for SeaGL is to produce an event which is as enjoyable and informative for those who spend their days maintaining hundreds of servers as it is for a student who has only just started exploring technology options. SeaGL's first year was 2013."

I've submitted a proposal for a workshop about how to edit Wikipedia. Attendance at the conference is free. More info about the call for proposals and the conference is available at http://seagl.org/