A few rogue macOS projects:
- User Defaults - a simple example using NSUserDefaults and a preferences window
- osx template - a cleaned up and (slightly) enhanced macOS "Hello, World" project template
- ExampleIB - an example demonstrating the use of an Objective-C Xcode project for the user interface
- Help Book Sample - not really RubyMotion specific, but a sample help book that can be dropped into your projects.