Phillip Hershkowitz

Amazon Simple Storage Service (S3) Front-End Buyers Guide

Image via Wikipedia

Here is a short list of some products that run on your PC and store files in the Amazon S3 file system for backup:

http://jungledisk.com
http://www.cloudberrylab.com
http://www.jfileupload.com
http://www.superflexible.com
http://www.crossftp.com
http://www.gladinet.com
http://www.lumensystems.com/s3safe.aspx
http://www.netcdp.com
http://backazon.com

If you use Firefox, there is the Amazon S3 Firefox Organizer (S3Fox)

If you use goodsync from roboform it can connect to amazon S3:
http://www.goodsync.com/synchronize-applications/how-to-sync-via-amazon-s3.html