showyedge

Install command: 
brew install --cask showyedge

Name: ShowyEdge

Visible indicator of the current input source

https://showyedge.pqrs.org/

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

Cask code: showyedge.rb on GitHub

Current version: 6.2.0

Requirements: macOS >= 13

Analytics:

Installs (30 days)
showyedge 16
Installs (90 days)
showyedge 38
Installs (365 days)
showyedge 213