keycastr

Install command: 
brew install --cask keycastr

Name: KeyCastr

Open-source keystroke visualiser

https://github.com/keycastr/keycastr

Cask JSON API: /api/cask/keycastr.json

Cask code: keycastr.rb on GitHub

Current version: 0.10.4

Requirements: macOS >= 10.13

Analytics:

Installs (30 days)
keycastr 1,221
Installs (90 days)
keycastr 3,545
Installs (365 days)
keycastr 15,532