Realms Hub
Realmshub is a website that lets its users log in with their Microsoft account to manage their Minecraft Realms through a browser, which is otherwise only possible in-game.
Except for the basic design of the website I am the sole contributor to the project, meaning I developed both the front- and backend, wrote a custom API wrapper for Microsofts and Mojangs APIs, designed the database and software architecture all while keeping the users data as secure as possible.
Realmshub is an actively developed open-source project.