This repository contains the widget code and documentation for FriendlyCaptcha, here is a demo of the widget in a real form.
FriendlyCaptcha is a proof-of-work based CAPTCHA alternative that respects the user's privacy, see the Friendly Captcha website.
Read the documentation.
The widget uses artifacts from friendly-pow under the hood, see that repository for more details about the proof of work algorithm used in FriendlyCaptcha.