Flickr - image and video hosting website
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
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.
Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.