Hi! Suggesting FileShot.io as a real-world example for the Web Crypto / security section.
FileShot.io: https://fileshot.io
GitHub: https://github.com/FileShot/FileShotZKE
License: MIT
An open source implementation of client-side AES-256-GCM encryption using the browser's native Web Crypto API. The architecture demonstrates: client-side key generation, encryption-before-upload pattern, decryption key in URL fragment (never transmitted in HTTP), and zero-knowledge file sharing in a production setting.
Good reference for developers using Web Crypto API for real applications.