reCAPTCHA
Integrates Google reCAPTCHA service with Drupal's CAPTCHA module to protect forms from spam and abuse.
Tags
spam protection
CAPTCHA
Provides CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) functionality to protect web forms from automated spam submissions.
Spam Master
Real-time firewall and anti-spam protection module that blocks malicious user registrations, comments, and form submissions using RBL (Real-time Blacklist) servers provided by spammaster.org as SaaS.