rubywhysomeoneagainusedmynickname

This plugin was created with simplicity in mind, it\’s main goal is to display cookie notices without much hassle. All you need to use it, is activating it. Later you can customize settings to your desire. 
In case using WPML (The WordPress Multilingual Plugin), you can have different settings depending on language you choose. 
The plugin is translation ready.

Simplest cookie notice

This plugin allows you to display cookie notice, enter notice text and style it.

aleapp

WP Cookies Alert allows to display an alert box on your WordPress blog notifying visitors you blog uses cookies as EU Cookie Law requires. 
You can display a short message or publish a link to a page with extended explenation. 
WP Cookies Alert works in multilingual blogs and can be translated to multiple languages. English and spanish are included.

WP Cookies Alert

This plugin adds an alert box notifying visitors your blog uses cookies.

Simplest cookie notice vs WP Cookies Alert