Flickr - image and video hosting website
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
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.
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.