There was a nice CAPTCHA solution developed by https://www.protectwebform.com
https://www.protectwebform.com/plugin_wordpress
They have a beta version, but they already have audio support, reload button for image,
and a very nice solution called “Smart Captcha”. I use it and it works for me fine currently.
It simply hides any CAPTCHA for all the reliable ip addresses.
Seems the there is some progress in developing captchas.
