FOSDEM (Brussels, Belgium) is probably the best community driven FOSS event in Europe. It's massive, chaotic and fun.
- /2013 — Talks participation of Wikimedia members
- /2014 — Wiki devroom, Wikimedia stand, other talks about Wikimedia
- /2015 — Wikimedia stand, talks about Wikimedia
- /2016 — Wikimedia stand, talks about Wikimedia, and maybe more...?