CrisisCommons is a global, open community of around 3,000 programmers who voluntarily develop and provide free software to help overcome natural disasters. The project was initiated in 2009 at a so-called CrisisCamp, a meeting of experts from the IT and software branches on the subject of crisis management. The developers keep in touch via email, Wiki and through regular meetings. CrisisCommons has now developed software following the earthquakes in Haiti, Chile and Japan and the flooding in Thailand, Nashville and Pakistan. The CrisisCommons network actively calls for further CrisisCamps to be organised.