JONO is a software musical instrument inspired by modular synthesizers.
By providing a mixture of classical and experimental elements it can serve as an interesting addition to your setup or as a standalone tool.
rePatcher is an Arduino shield that allows you to repatch your Max/MSP or Pure Data patches with a 6 x 6 patchbay matrix. It also has 6 general purpose control knobs for modifying parameters in your patch. Since it does all of this over USB, it can be hacked to work with any other program that can accept a serial stream.