UseR! is the highest profile and, I believe, most popular annual meeting for R enthusiasts, known affectionately as ‘UseRs’ for the purposes of the event. For those who have been living under a stone for the past decade ;) R is an open source statistical programming language that has seen explosive growth since ‘data science’ became a buzzword.
I presented last Thursday at FOSS4G, THE conference to go to for Free Open Source Software for Geo applications (get it?). It was an interesting event, with hundreds of delegates dressing up in one form or another as Robin Hood, fantastic food and a very wide range of talks. Just take a look at the second day of talks: packed to the rafters with sessions, including mine, on visualisation.