UpSafe (c) Google Mail Backup Freeware - backup your GMail and GApps mailboxes. Quickly and easily back up your GMail account locally and to the cloud. Restore single items or the whole maillbox. Archive email messages to save space.

Main features:

Backup your GMail messages to local disk
Incremental backup
Compressed traffic from GMail
Restore the whole account
Single message restore
Archive email

Benefits:

Make sure your mailbox is not affected by outages and user errors
Keep the copy of your mailbox locally at hand
Ensure that you important mail is never lost