I'm looking for a replacement for JCaptcha, which doesn't seem to be maintained any more, and isn't very good to begin with. The replacement has to integrate nicely with JavaEE webapps.
As I can see it, there are three options:
JCaptcha - No longer maintained, crude API
SimpleCaptcha - much nicer API, nicer captchas, but seems to be Java6 only
ReCaptcha - easy to use, uses remote web-service to generate captchas, but not much control over look and feel
Has anyone used any others, that they'd recommend?