Super CAPTCHA Security Suite

It can add an image CAPTCHA field to the registration, login and comment forms.

Installation:

Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.

Features:

• Programmed with security as a #1 priority.
• Visual Confirmation CAPTCHA using random text and number strings, or custom word-list for easier reading.
• IP Filtering and cross-linking stopping repeat spammers from attacking your blog automatically.
• One-click mass-spaming from the Logs Admin page.
• Know exactly who is trying to access your site with a comprehensive logs view page.
• Pluggable -- open for other developers to create their own hooks inside the software.
• Verbal (audible) readout of the image that is displayed for those that are visually impared or where the image is greatly obscured from reading that is rendered from the script itself and hard for any bot to "interpret".
• Confirmation box is placed automatically on the login page, and the registration pages.
• Dashboard heads-up display on the blocked attempts to your site.
• Buddypress compatible.
• Fully configurable display and you control where and when the CAPTCHA is displayed by checking a box.

What is new in this release:

• Code cleanup.

What is new in version 2.4.4:

• FEATURE:
• No more split downloads for SuperCAPTCHA Free and SuperCAPTCHA Pro. Entering a valid Pro license will automatically download and update your install.
• Check your license key from the SuperCAPTCHA admin panel and buy a key just as easy.
• Buying a license key automatically removes the credits and "Secured by" footer line legitimately.

What is new in version 2.4.2:

• Fixed the issue causing the get_var error on wordpress installs where it is not the site root.

What is new in version 2.3.1:

• Minor bugs fixed.

What is new in version 2.2.4:

• Features:
• Help area added to better educate people to how to use Super CAPTCHA as well as an added support link.

What is new in version 2.2.3:

• BUG-FIXES:
• Words.txt was damaged during previous version commit. It has now been fixed for this version.
• Dashboard overview now displays properly on the network admin dashboard and will not display on admin dashboard if in multi-site mode.

What is new in version 2.2.2:

• Now installs flawlessly and automatically fixes many database errors that it may come across.
• Intelligent sanity detection - prompts to fix errors in the database automatically.

Requirements:

• WordPress 3 or higher
• PHP 4.3 or higher
• GD support in PHP