Hashcash for Contact Form 7 v0.1.4.1Add Hashcash spam protection to Contact Form 7.Rating★ 4.7Active installations75.4K+ activeTested up toWP 3.7.41Requires PHPPHP —UpdatedUpdated Dec 28, 2013Downloads7.7K+ downloads
Hashcash v1.0.14Integrates Hashcash.IO proof-of-work widget with login/registration/comment forms.Rating★ 4.9Active installations5.8K+ activeTested up toWP 4.9.35Requires PHPPHP —UpdatedUpdated Jan 13, 2018Downloads19.7K+ downloads