Google Toolbox for Mac
The GNUstep is a library of general-purpose Objective C objects
Build desktop + mobile apps with Zig and web UI
Create native Mac applications from command line scripts
A conforming Objective-C WebSocket client library
Smooth asynchronous user interfaces for iOS apps
Visual Automation IDE — automate anything you see on screen
SOGo Zero-Effort-Groupware
A delightful networking framework for iOS, macOS, watchOS, and tvOS
Collection of useful Objective-C Categories extending iOS Frameworks
BFKit is a collection of useful classes and categories to develop Apps
Dates and times made easy in iOS
Send User Notifications on macOS from the command-line
Share one mouse, one keyboard and one clipboard between your computers
A collection of iOS components
A well crafted open source iOS framework
The Objective-C block utilities you always wish you had