Stefano Bordoni has written a small application that allows you to synchronize files and folders automatically. It’s very simple, but you are encouraged to first read the included documentation. The features are as follows:

• Multiple folder handling (2 or more)
• The folder analysis can be modified to your needs
• Multi threaded
• Optimal file multi threaded copy engine (by using temporary file and/or by overwriting files)
• Configurable. You can easily integrate it with a text editor, a hex editor, and a diff viewer
• Minimal registry usage (only for Explorer integration)
• Small, fast, and clean
• HTML Help included
• Editors note: advanced users only!!!

Horodruin is available for download here.