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Captchas and anti-spam

  • Invisible Captcha – Unobtrusive and flexible spam protection based on the honeypot strategy. It also provides a time-sensitive form submission.
  • Rakismet – Easy Akismet and TypePad AntiSpam integration for Rails.
  • reCAPTCHA – reCaptcha API helpers for ruby apps.
  • Voight-Kampff – A Ruby gem that detects bots, spiders, crawlers and replicants.
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