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 (which I implemented from scratch) to get eventual consistency between the sessions. Try it out

TIL: CRDTs, ATs, tombstoning