switchkey

Install command: 
brew install --cask switchkey

Name: SwitchKey

https://github.com/itsuhane/SwitchKey

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

Cask code: switchkey.rb on GitHub

Current version: 1.1.3

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
switchkey 16
Installs (90 days)
switchkey 63
Installs (365 days)
switchkey 345