Sync Eclipse workspace, different OS, how?
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I would like to sync Eclipse workspaces between XP and Seven because I often write on netbook when I'm away, on notebook at home. I used Dropbox before, because my two computers were both Seven. Now, with XP on netbook, I've got path incompatibility with extern libraries and other references. What is the best way to share my projects? 
Requirements:

 1. My code shouldn't be public (no git, svn, etc)
 2. It shouldn't be a payment service
 3. No USB
 4. I would like to maintain src + metadata in the same folder, so I don't have to change everytime nothing when I create a new project

Thank you!