AmbiaMara(iOS and Mac)
AmbiaMara is the ultimate countdown timer. Originally designed to time public speakers, it has proven itself to be useful in all situations requiring a precise, attractive, and noticeable timer.
Blue Van Clef (iOS, Watch, TV, and Mac)
Blue Van Clef is an extremely simple “Bluetooth Low Energy (BLE) Explorer.” It allows you to discover nearby advertising BLE devices, and examine their properties.