Flickr - image and video hosting website
Scanbot - Scanbot is a mobile app that allows you to use your device's camera as a document scanner. The app is capable of scanning a large number of source materials, and it can handle QR codes as well.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.
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.
Genius Scan - On The Go.