A spin on the wehatecaptchas clientside JavaScript.
The goal of this script was to make the wehatecaptches JavaScript more customizable while also retaining the original spirit of the project. If you are thinking "This is something I could use in my own project," you would be wrong. I suggest highly you start off using the source as a foundation. I cannot guarantee this will work, and will not be able to offer support for issues you run into.
All credit goes to wehatecaptchas and Dalton Edwards, it's creator. Current maintainer: Cohan Robinson