Open-Source Software Engineering (OSSE) has emerged as a cross-disciplinary paradigm for distributed enterprise computing. OSS, in many cases, has kept the software market away from monopolies. It is helping organizations to keep a control on the cost of development and deployment. OSSE has also changed the way software applications are architected, deployed, and consumed. Al-Khawarizmi Institute of Computer Science, University of Engineering and Technology, Lahore, is organizing a two-day conference 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. ICOSST-2009 will create a scientific venue where participants can share ideas for tackling the research and development challenges related to open-source tools and open-source development environments for the critical applications. ICOSST-2009 will address:

(1) Development of open-source stand-alone software tools, toolsets, and IDEs for critical, complex, and robust enterprise information systems.

(2) Development of case tools like modeling editors, build automations, continuous integrations , loggings, debuggings, tracing, performance, code generators, document generators, installers, search, rule engines, databases, and presentation