Please visit my FOSS project page, CodeQuery, which is a code-browsing/ code-search tool for C, C++, Java, Python, Ruby and Go. It is based on the databases of cscope and ctags, to create its own sqlite-based database, allowing faster lookup for auto-completion, compensates cscope's lack of understanding of OOP and fast multiple queries to generate visualization e.g. function call graphs. It runs on Windows and Linux.