BitTorrent is developing a PC-to-PC sync feature, currently available for testing.
BThe company did not provide details about the new feature, rather than its "a new distributed syncing product to help manage personal files between multiple computers."
Currently in a "pre-alpha" version, the feature is still incomplete so have in mind that it could crash or cause other system issues.
You can give it a try
here. When you visit the site you will be asked to fill out a brief form and then told that you will receive an email invitation.