www.emoze.com is an amazingly easy to use mobile application which allows you to receive and send e-mails and other communication tools on your mobile phone.
Lots of popular email clients are supported, including Gmail, Yahoo, Outlook and Hotmail - but you will have to pay a small premium subscription fee if you want it to work across multiple accounts.
You can add Facebook messages, calendars, tasks and contacts. Once you have all your options set up it is incredibly fast and easy to use.
This is the kind of application that once you start using it, you will wonder how you ever managed without it.