GitPigeon - GitHub notifications delivered to your Mac
Sociall (Beta) - A secure and private decentralised social network for all.
Gitify - GitHub Notifications on your desktop.
Manyverse - A social network off the grid
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.
Planetary - Decentralized social media by and for the people.