Eclipse Diagram Tools supplies Eclipse plug-ins which allow you to create miscellaneous diagrams within Eclipse. It features client/server architecture diagrams, autolayout, and the ability to export BMP, GIF, JPG, SVG, PNG, and PDF files.
tagfs is a virtual user space file system to handle tags. It can be used to organize your files using tags.
A mental arithmetic practice program.
A search engine with a Web, file, and database crawler.