backup your files to your Amazon S3 account

Arq is online backup for the Mac:

Automatically back up your important files to Amazon's S3 (Simple Storage Service).
Never again worry about remembering to plug in an external drive for backups.
Maintain 100% privacy (AES-256 encryption) and control of your data.
Control exactly what gets backed up, with no limits.
Drag-and-drop to restore files immediately and correctly, with all the Mac metadata and resource forks.

Arq throttles its network usage so it doesn't get in your way.
Arq "de-duplicates" your files, never backing up the same file twice.
Arq thins your backups as they get older to save space, just like Time Machine.
Give Arq a storage budget and Arq drops the oldest backups to stay within it.
Arq never modifies your files or folders.

Follow Arq at @arqbackup
http://www.haystacksoftware.com/arq