Open source
[macOS] Menu 
Fully customizable macOS drop-down menu with 30 settings you can play with!
[macOS] Popover 
Fully customizibe drop-in replacement for NSPopover on macOS
[iOS] Haptico 
Haptico is easy to use iOS haptic feedback generator. Besides default haptic feedbacks it can play patterns!
[iOS] Segmented Progress View 
🔘🔘🔘⚪️⚪️ Simple Instagram-like segmented progress view with completion handler and different time intervals for each segment
[iOS] LocationPicker 
Location picker 🗺 similar to Apple’s Reminders app and Find my friend app
[iOS] StatesController 
UIViewController which implements switching states: Loading, No Data, Error and Content