I maintain a big list of apps I use on my system here together with why and how I use them.

And here is a full list of the apps I have inside my /Applications folder.

Nice OSS macOS Swift/ObjC apps

• ​Twig - Modern macOS markdown editor.

• ​Sloth - Displays all open files and sockets in use by all running processes on your system.

• ​Workbench - Seamless, automatic, “dotfile” sync to iCloud.

• ​LuLu - Free macOS firewall.

• ​Conferences.digital - Watch the latest and greatest conference videos on your Mac.

Links

• ​Awesome macOS apps​

• ​Open Source macOS apps​

• ​Hyperlink and Deep Linking URLs​

• ​Ship app open source code - Amazing GitHub native client that was closed down.