Stream UI Kit - A beautiful open source Bootstrap 4 UI kit
Bootstrap Zero - Open-source, free Bootstrap templates collection.
Rainbow UI Kit by EpicPxls - A colorful Bootstrap 4 UI Kit for landing pages
Bootstrap Magic - Create your Bootstrap 4.0 themes easily with magic
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.
Cruip - Landing page templates for startups