Metrify – mobile app for tracking your personal metrics. You can create custom data types (numbers, enumerations or ranges) and create entries for anything, be it running or weight tracking. Metrify is free & open-source.
Ariadne Headband – non-visual navigation that uses vibration motors to provide haptic guidance. Hardware is based on Arduino board with few modules and is controlled by our custom Android app. It is targeted for those that cannot or don't want to use visual navigation (e.g. maps), mainly blind people. All parts of project Ariadne Headband are available on our repository. You can also watch our video or read what others wrote about us on arduino.cc, hackster.io or hackaday.com