WatchMyCode: Like Google docs for code interviews
WatchMyCode is a collaborative code editor I made for fun and because I didn't like using google docs for code interviews anymore. I vowed to spend a weekend building the "google docs for coding interviews" as a fun learning project. It took me 2 months. But it works really well. Based on Firebase, and uses CRDTs to get eventual consistency between the sessions. Try it out at WatchMyCode.com.
This is an emulator for Chip-8 systems written in JS / React and runs in your browser. I wrote this for a talk at Framework summit. That means you can play pong, Space Invaders etc. The source is on GitHub.