JaxoDraw is a tool to generate Feynman diagrams in a mouse click-and-drag fashion. Graphs can be exported to a variety of graphics formats and arbitrary latex code can be used for labels to produce high-quality publishing-style figures.
Small stand-alone Java utility to visualize and compute drive train translation ratios for derailleur geared bicycles. Features load/save of data, chainline quality visualization, and scale drawing of the drive train with measures.