Kudos

Kudos works just the classic Facebook Like button.

It allows users to press the button and add a vote to the post.

Pressing it again will remove the vote given before.

Installation:

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

Features:

• Can be added automatically to every post
• Can be added via shortcode
• Can be added via template tag
• The Kudos button's position can be modified
• CSS spacing issues can be customized
• Button cookie lifetime can be modified
• Un-kudo ability can be turned off
• Hover and default "Kudos" text can be customized

What is new in this release:

• Tiny PHP 5.2 fix.

What is new in version 1.1:

• Added option to disable unkudo'ing.
• Added contextual help.
• Added settings action link.
• Removed kudos from feeds.

Requirements:

• WordPress 3.1 or higher