A general purpose source code indexer and cross-referencer that provides web-based browsing of source code with links to the definition and usage of any identifier. Supports multiple languages. Up-to-date information in http://lxr.sourceforge.net
A cross-platform file diff and directory diff Tool. Also contains an SCM project which uses the stand-alone tool. Go to https://vmaster.sourceforge.net to see screenshots or to start the diff tool.
Code Insight is a Open source, cross platform software for developers to browse, edit and understand code easily, like commercial one named Source Insight. Based on CodeLite IDE the CodeInsight also is aligned with GPL license.