s2Member®—a powerful (free) membership plugin for WordPress®. Protect members only content with roles/capabilities.
Adds the new google “Are you robot?” recaptcha to wp-login page, registration page, comment forms, buddypress registration page and contact form 7
The simplest way to turn your standard WordPress website with a standard WordPress theme into a Social Network.
This plugin adds a new form of captcha to your Buddy Press registration and comment forms. Use this plugin to prevent bots from spamming your website
Addon plugin to s2Member. Additional functionality for Multi-Site Installations. s2Member 3.1.2 required.