Nextend Twitter Connect

The plugin guides the webmaster through the process of adding a Twitter authentication button to his login and registration page.

It also allows existing users to link their profiles with a Twitter account.

Installation:

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

The plugin is also available with support for other social networks, including:
Google
Facebook

Features:

• Very well documented
• General settings page added in the WP backend
• Easy to style
• Button creator app

What is new in this release:

• Security fix for redirects.

What is new in version 1.4.61:

• Profile image fix.

What is new in version 1.4.59:

• Changing to Twitter API 1.1 as 1.0 doesn't work any more.

What is new in version 1.4.56:

• Fixed typo in redirects.

What is new in version 1.4.52:

• Avatar fix.

What is new in version 1.4.41:

• Redirect URL fix.

What is new in version 1.4.36:

• PHP notice fixes.

What is new in version 1.4.35:

• JavaScript login fix for "SimpleModal Login".

What is new in version 1.4.25:

• wp_login do_action fix.

Requirements:

• WordPress 3 or higher