Simple, but strong HTTP security, to prevent Brute force attack. One-click solution!
A simple solution to misbehaving users.
Add additional contact info fields to the user profile page and/or disable the instant messager fields.
Allows a User to display their Twitter picture and link next to a comment they make on a post.
Convert twitter usernames, hashtags and lists in pages, posts or comments to a twitter link.
Register Modal provides a modal Ajax-ify box to register for WordPress!
As nice scroll is a jquery plugin for WordPress site. This plugin will create a nice scrollbar for your site.
Allows you to enter national characters (special characters) in username during registration.
When someone gets a password wrong or uses the forgotten password form on your site, the administrator is emailed with the details that were entered.
AS login you can fully customize wordpress login page.
Allows users to login by their username or email.
A plugin for live username availability checking.
MJP Security Tools is a plugin designed to fix a lot of WordPress security issues, as well as providing extra support.
Replaces Twitter usernames (@larsreineke) with correctly linked ones (@larsreineke)
Email bbPress topic/reply mentioned users, set custom email and some basic settings
OpenOTP plugin Enable two-factor authentication for your admins and/or users
For popular blogengines only. Aliases for users and communities (read FAQ section) will be replaces with correct HTML code.
Plugin to allow users to login by a number, their user ID (optionally prefixed)
A plugin to make linking to Twitter users easier with shortcodes.
This plugin allows users to log in using either their username OR email address.
Add Hebrew characters to sanitize_user
A secure plug-in which helps you be away from being collected, brute force attack and so on, Based on SaFly Cloud API, Designed by SaFly.ORG™.
An add-on for WP User Manager that let's you define minimum and maximum username length.
SuperAuth is the truly passwordless authentication system. No passwords, no usernames, no typing, nothing to forget, and completely secure.
This plugin will clean up the mess when your user database is full av invalid usernames.
Add TOZNY as an authentication option to your WordPress.