captcha-core (hackage): A package for integrating a variety of captcha solving services.  Feature list:  Makes use of the lens package  Mtl-style typeclass, allowing you to use your own monad transformer stack  No exceptions are thrown. Errors are shown explicitly through its type signature  Minimal test suite provided for each captcha type  Captcha services are separated into different packages. Use what you need!
Keywords: library|mit|network