1. Tags2umlGenerates UML class diagrams, from source code. Command line tool to convert from a Exuberant-ctags tags file to a UML class diagram, through Graphviz DOT, for all object oriented languages supported by ctags
2. CodequeryA code-understanding, code-browsing or code-search tool. This is a tool to index, then query or search C, C++, Java, Python, Ruby, Go and Javascript source code. It builds upon the databases of cscope and ctags, and provides a nice GUI tool.