App: TapNTempo
Developer: Jnote.org
Genres: Music, Education

TapNTempo is a fully featured metronome that offers customizable sounds, real-time tempo tapping, and beat and division capabilities. TapNTempo’s easy-to-use interface includes the best of the traditional metronome, but feature bloating is avoided in favor of simplicity. Nonetheless, TapNTempo includes the following: 

Choice of sound production 
MIDI Out 
Built-in synthesizer
Access to macOS’ built-in MIDI synth
Sounds using 128 preset instruments
Real-time tempo tapping  
Global muting 
Beat and division capabilities
Mute any division of the beat, including the first
Multiple methods of data input, including direct typing
Keyboard shortcuts 
Responds to tap while on or off
Easy-to-read display 
Visual interface elements for when sound is either on or muted 
“Listen” mode for tapping on the fly
Choice between tempo averaging or precise tapped tempo
Ability to mute selected divisions of beat 
Factory reset

Release notes:
Fixed issue where using some keyboard shortcuts caused tempo to reset in metronome