Flickr - image and video hosting website
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
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.
TiddlyWiki - a non-linear personal web notebook