Captcha-less Hashcash spam protection for Contact Form 7

Contact Form 7 is the most popular contact form plugin for WordPress. WP Hashcash is a javascript based captcha-less spam protection plugin for WordPress. Hashcash for Contact Form 7 is a plugin that I have coded that bridges WP Hashcash and Contact Form 7 allowing you to protect your contact form with a captcha-less spam prevention system.

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