Louy Alakkad

This plugin gives you the ability to run the site in a language (Arabic for example) and use the admin panel in another (like English).
Just go to Settings » General and choose your language.

Admin Locale

This plugin allows you to change the language of the admin panel without changing the whole site language.

Sam Bull

Add a mailto link to your site so that every visitor gets a unique disposable 
address, generated through the TrashMail service.

TrashMail Contact Me

Generate unique disposable contact addresses for each visitor.

Admin Locale vs TrashMail Contact Me