WordPress Plugin SI CAPTCHA Anti-Spam Description:
Adds Secure Image CAPTCHA anti-spam to WordPress pages for comments, login, registration, lost password, BuddyPress register, bbPress register, wpForo register, bbPress New Topic and Reply to Topic Forms, Jetpack Contact Form, and WooCommerce checkout.
In order to post comments, login, or register, users will have to pass the CAPTCHA test. This prevents spam from automated bots, adds security, and is even compatible Akismet. Compatible with Multisite Network Activate.
If you don’t like image captcha and code entry, you can uninstall this plugin and try my new plugin Fast Secure reCAPTCHA
Related to WordPress Plugin SI CAPTCHA Anti-Spam
WPSlug.com data has a list of 1,934 WordPress CMS installations Using the WordPress Plugin SI CAPTCHA Anti-Spam.