Awesome list of open source applications for macOS. https://t.me/s/opensourcemacosapps
Keylogger for mac written in Swift using HID
Replacement for RCDefaultApps, written in Swift.
Mac OS X Application like a menu bar popup message
Mac App Store command line interface
Example application for the book "Creating Multi-Process Mac Applications"
Desktop application for Mac OS calling Microsoft Graph. It's written in swift and uses the Microsoft identity platform