Stream UI Kit - A beautiful open source Bootstrap 4 UI kit
Invision - Prototyping and collaboration for design teams
iOS Starter Pack - A bundle of beautiful, functional iOS apps built with SwiftUI to get you started.Includes the Xcode projects and SwiftUI code for the Shop App, Finance App, and Social App.
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Rainbow UI Kit by EpicPxls - A colorful Bootstrap 4 UI Kit for landing pages
Craftwork - A collection of User Interface resources made by Craftwork