I keep a risk register for the same reason I keep a TODO list: memory is not a system. So I built a small, browser-only tool to keep the register clean and boring.
Risk Register Lite lets you add a risk, set likelihood and impact, and capture mitigation notes. It scores each item, stays local in your browser, and can export to CSV when you need to move the data elsewhere.
I also added JSON load/save so you can pass a register around without arguing over spreadsheets.
You can find it at /riskregister.