Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Flickr - image and video hosting website
GIMP - GIMP is a multiplatform photo manipulation tool.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
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.