Flickr - image and video hosting website
showFoto - ShowFoto is the standalone image editor of the digiKam project.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
PixBuilder - Free Photo Editing Software for PC
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.
PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.