Flickr - image and video hosting website
Spine - Spine is 2D animation software designed specifically for software and game development.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Synfig Studio - Just another WordPress site
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.
AnimeEffects - AnimeEffects is a 2D keyframe animation tool based on deformation of polygon meshes.