PHP::Duploc helps you find duplicate code (a \"bad smell\", prompting a refactoring) in your PHP scripts. By looking for certain patterns in a \"dotplot\" graph, you can visually get a quick overview over a large body of code.
TouchGraph provides a set of interfaces for graph visualization using force-based layout and focus+context techniques. For now only older code is available, but we are planning to release new versions as well.
The MathForge Application Environment provides users a broad range of Java-based math tools (calculation, visualization, presentation and communication via MathML) and allows developers to leverage existing code while extending MathForge.
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A code toolkit for collecting usability data on the web. Tools range from an entirely client side solution for measuring scrolling and render time to a hybrid solution logging user activity every 200 milliseonds. Currently IE only.
** IMPORTANT NOTICE ** 10 Feb 2006 Code is being moved to the SMI subversion repository (http://smi-protege.stanford.edu/svn/owl/trunk/) Project will continue to be open source. ProtegeOWL info at: http://protege.stanford.edu/overview/protege-owl.html