PHP Chart is an AJAX control for generating dynamic charts and graphics. No PHP GD or any other third party graphic libraries are required on your server. The phpChart has amazing rendering speed because all graphics are completely processed in the Web browser on the client side, thus saving your valuable server resources. It supports all major charting graphs such as pie, bar, scatter, balloon, radar, bubble, zooming, candlestick, block, curve, donuts charts, and much more.
Archipel is a multithreading framework for Java. Threads working together can be seen as a graph in which each thread is a node. That's exactly what Archipel does. The aim is to make multithreading easier. Simply define your data exchange structures and write the business code for each of your threads, and Archipel handles the rest.
Hypercube is a graph visualization tool for drawing DOT (graphviz), GML, GraphML, GXL and simple text-based graph representations as SVG and EPS images. It comes with a Qt-based GUI application and a Qt-independent commandline tool. Hypercube uses a simulated annealing algorithm to lay out the graph, which can be easily parameterized to achieve the desired look.
Qtnp is program for math\physics teachers and students. There 4 tools: Pen, Line, Jogged line, and Circle. The software can draw grids, coordinate planes, and graphics. It has flexible settings, presentation mode, support for all base formats, a GUI for blackboards/tablets, and a built-in powerful calculator.