Captcha::reCAPTCHA
I’ve just released a Perl interface to reCAPTCHA. You should be able to find it here:
http://search.cpan.org/dist/Captcha-reCAPTCHA
At the time of writing the US mirror of search.cpan.org doesn’t seem to have updated for a few days so if you need it in a hurry you can also get it here:
http://cpan.hexten.net/modules/by-authors/id/A/AN/ANDYA/
