Most of the things I've built are one shot hackathon projects that aren't suitable for general release. Anything suitable and fun to play with will eventually get added here.
This was made after a computer science professor at UC Berkeley wanted someone to take an offline script that printed some ECC problems and put it online. I converted the script to use a web form instead of stdin for input and display errors in a more graceful manner. Then I stuck it into a Flask server and put it up here.Live demo.