- Paperless if you want to keep your digital documents organized.
- Jellyfin/Navidrome for music streaming if you have a collection.
- AudiobookShelf for streaming & tracking progress of audoobooks if you have a collection.
- Kitchenowl for organizing your household (expenses, shopping lists, recipes, planning meals)
- FreshRSS for RSS-Feeds (News, Blogs etc)
- LinkDing for Bookmark Management
- Game-Servers (like Minecraft or others)
EDIT:Added Linkding & GameServers