ICOSST-2010, a three-day conference, is to invite researchers and practitioners from across the world to share their ideas and experiences related to the state-of-the-art and the future of open-source software like virtualization, knowledge-bases, surveillance, automation, etc. ICOSST-2010 will create a scientific venue where participants can share ideas, strategies, and policies for tackling the development, research and adaptation challenges related to open-source tools and open-source development environments for the customized and enterprise grade applications. The Event includes 1)Student Quiz Competition. 2) Speed Programming Competition. 3) Student Project Ideas Presentations. 4) OSSW Open source tools workshops. 5) ICOSST conference.