I only know about Buster: > The difficulty of captchas can be so out of balance, that sometimes they seem friendlier to bots than they are to humans. The goal

I only know about Buster: > The difficulty of captchas can be so out of balance, that sometimes they seem friendlier to bots than they are to humans. The goal of this project is to improve our experience with captchas, by giving us easy access to solutions already utilized by automated systems. https://github.com/dessant/buster/blob/master/README.md https://github.com/dessant/buster/blob/master/README.md