Source code analysis is important for software management. It enables us recognize strengths and weaknesses in our earlier projects or releases. We developed a source code analysis tool. This tool gathers several metrics from C/C++, C# or Java source codes. In this paper, we will use the tool to analyze some of the open source code projects. We will study the selected projects release evolutions and compare some characteristics between the same project releases, as well as among different projects. Different programming language code and development styles will be studied through those open source projects.