dolt is a cross platform HTML preprocessor, which replaces specially formatted HTML comments with the contents of another file. It works much the same way as SSI, but without the server requirements, as files are processed before they are uploaded to a Web server. For example, it allows you to update a menu on every page by changing one file. This gives you some of the benefits of frames without any of the problems.
Janino is a compiler that reads a Java expression, block, or source file, and generates Java bytecode that is loaded and executed directly. It is not intended to be a development tool, but an embedded compiler for run-time compilation purposes, such as expression evaluators or "server pages" engines like JSP.
MST is a very simple Java application for calculating a minimum spanning tree from a weighted, undirected graph. The graph is read from a standard ASCII text file. One of the possible minimum spanning trees for the graph is then printed to the screen, along with the total weight of the tree.
VAMP (Very Attractive Mail Program) is an extremely easy-to-configure, usable, Web-based email client written in PHP3 (and compatible with PHP4). It is for use with POP3 servers, and it also supports "Virtual Domains", encryption (under Linux/PHP3), attachments, contact list, a signature database, an easy-to-use setup tool, and more.
QuickHP is an easy to use tool to keep your homepage in order. It is fully XML-based, and you use it by creating XML source files that are parsed through an XSL template to create HTML or any other files. It comes with a comfortable Web-based file browser that lets you create and edit files, remove files, copy files, and create directories, and features file versioning and upload. QuickHP can be used for dynamic sites and interoperates with PHP.