Flickr - image and video hosting website
wxWidgets - wxWidgets: Cross-Platform GUI Library
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Electron - Build cross platform desktop apps with web technologies
PhotoPrism.app - PhotoPrism® is an AI-Powered Photos App for the Decentralized Web. It makes use of the latest technologies to tag and find pictures automatically without getting in your way. You can run it at home, on a private server, or in the cloud.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.