eldavojohn writes "In 2008, static analysis company Coverity analyzed security issues in open source applications. Their recent study of 11.5 billion lines of open source code reveal that between 2006 and 2009 static analysis defect density is down in open source. The numbers say that open source defects have dropped from one in 3,333 lines of code to one in 4,000 lines of code. If you enter some basic information, you can get the complimentary report that has more analysis and puts three projects at the top tier in quality of the 280 open source projects: Samba, tor, OpenPAM, and Ruby. While Coverity has developed automated error checking for Linux, their static analysis seems to be indifferent toward open source."