Image-clicking Q&A captcha alternative that is customisable?
Here's one option I've found - Fancy captcha - based on a library which uses icons. Looks like a simpler stack than Confident Captcha, but no stable release on D7.



Pros:


Based on a re-purposed library installed locally, so you can modify the files
Doesn't require a third-party service


Cons:


No stable non-dev release yet (at time of posting)
I can't see any evidence of an accessible fallback for screen readers etc