Metalist with lists of Open Source Objective-C software

Mac/Cocoa Apps

Open Source Mac Apps - https://github.com/jeffreyjackson/mac-apps
Awesome macOS open source applications - https://github.com/serhii-londar/open-source-mac-os-apps

Mac/Cocoa Frameworks

Open-Source Mac Frameworks - https://github.com/jeffreyjackson/mac-frameworks
awesome-objective-c - https://github.com/uhub/awesome-objective-c

iOS / CocoaTouch Frameworks

Awesome iOS A curated list of awesome iOS ecosystem, including Objective-C and Swift Projects - https://github.com/vsouza/awesome-ios