Gmail, also known as Google Mail, is a free email service with innovative features like “conversation view” email threads, search-oriented interface and plenty of free storage (almost 7GB). Need to get caught up on your Gmail? Gmail is available through your mobile devices.

The only drawback of using Gmail for our business has been the inability to work with our email when offline. Not to fear! Gmail has come through.
Google is rolling out a Google Gears version of Gmail that will be available to users starting today in Gmail Labs. It will be reaching users slowly so you will need to check on it.
After installing the Google Gears plug-in to your browser, Gmail detects when you are offline. By caching your e-mail so that you can read it, respond to it, search it, star it, or label it and open attachments, Gmail is more accessible.
These are all the new features listed on Gmail’s website:
Multiple accounts.New! Quickly switch between your Google Apps email and Gmail from the same client.
Multiple Mobile Drafts.New! Jot your thoughts down, finish and send later.
Shortcut keys*.New! Undo, scroll up and down, archive, delete, refresh at the push of a button. See Menu/Help in the app.
Basic offline*.New! Compose and read your most recent email even when you’re on the subway or plane.
Language Support.New! Gmail for mobile 2.0 is available in over 35 languages.