Trackmate is an open-source initiative to create an inexpensive, do-it-yourself tangible tracking system. The Trackmate tracker allows any computer to recognize tagged objects and their corresponding position, rotation, and color information when placed on a surface. With over 280 trillion possible visual markers, each tagged object can be unique in the world and work seamlessly across any Trackmate system. Trackmate sends all object data via LusidOSC (a protocol layer for unique spatial input devices), allowing any LusidOSC-based application to use the spatial object information.