GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
Fine Tuner - Fine Tuner is a minimalistic guitar tuner that utilizes your device's built-in microphone.
TinyWall - Lightweight and non-intrusive firewall
Metronomus - Powerful and beautiful online metronome
Little Snitch - Little Snitch is a firewall application that monitors and controls outbound internet traffic.
LINGOT - Musical instrument tuner, LINGOT is a musical instrument tuner.