Tile - Track your lost items
Gitify - GitHub Notifications on your desktop.
Clap To Find My Phone - Clap To Find My Phone is a free-to-use app through which you can precisely discover your cell phones and tablets just by clapping.
GitPigeon - GitHub notifications delivered to your Mac
Tile Sticker - The small Bluetooth tracker that sticks to anything
Neat.run - Neat puts SaaS notifications in your menu bar. Streamline your code review and ship with ease. Preview, triage, and jump to issues in one click or keystroke.