Free (or OS) cloud backup program [closed]

I am looking for program which would allow me to backup data from Windows web server 2008 to cloud storage (Amazon, Rackspace and so on) - sites and mssql express backup files and automatically encrypt these files.

If what I know is correct that this functionality provides Jungle Disc or CloudBerry Backup Server or Zmanda Cloud Backup which are all commercial programs. I am looking for something open-source or at least free runing under .NET (or native application for windows) - no Java or something like this.

Does it exist?

Yes and of course: It would be nice if it was possible to decrypt backup on home computer.

EDIT:

I have found software on http://www.secobackup.com/downloads3.html which support Amazon S3 storage.

Solution 1:

http://www.maluke.com/software/s3-backup

Solution 2:

Most cloud storage providers either provide their own software/API or they use standard network/file transfer protocols to achieve the same functionality.

Solution 3:

You mention Zamanda as a commercial product, they also have an open source/community version available:

http://amanda.zmanda.com/

here's the feature comparison for community vs enterprise:

http://www.zmanda.com/Amanda-Enterprise-Amanda-Community-comparison.html