FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Flickr - image and video hosting website
Phiewer - Image Viewer - Phiewer is the easiest and fastest way to view your images, videos and even audio files.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
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.