Aleksandar Erkalovic (Croatia), software developer and resident at mi2lab. He is the main developer of collaborative web application tamtam. Together with developing software, Aleksandar organizes creative and educative workshops directed to young people, experts and amateurs, who are eager to find more about possibilities of tamtam and the idea of open source software in general. He has organized workshops at Tactical Media Camp in Vis An Dubrovnik, in Zagreb, at Next Five Minutes in Amsterdam, etc. He is the lead developer for Booki.