Simple to use profile plugin allowing front-end login, user registration and edit profile by using shortcodes.
Allow site admins to automatically add existing users to their site, or let users decide at the click a button.
Integrates reCAPTCHA anti-spam methods with WordPress including comment, registration, and email spam protection.
Adds new fields and forces new users to register additional fields (such as first name and last name) or any new field you wish to add.
This Plugin provides very simple and powerful captcha for your blog with wide variety of captcha methods and models.
Help combat spam registrations by forcing the user to answer a simple math sum while registering for your BuddyPress-powered site
Keep Your Site Happy, add Khush Captcha Anti-SpamBot Technology to your WordPress Registration and Comment Forms.
Automatically create and accept friendships for specified users upon new user registration. * Requires BuddyPress
minteye - STOP SPAM, MAKE MONEY!
This plugin replace WP default admin/login/register page.
Enhance default Registration form, Custom logo, Password field, Invitation codes, Paypal, Captcha validation, Email verification, user moderation &
The Stop Spammers Plugin checks comments and logins 15 different ways to block spammers.
Stop spam with a fun game instead of distorted text! PlayThru works effortlessly on blog comments, registration pages, lost password forms, and more.
Disable new user registration confirmation email.
Allows users to register with Cyrillic usernames.
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