• OS X:
  

  ~/Library/Application Support/Sublime Text 2/
  

• Linux:

  ~/.Sublime Text 2/
  

• Windows:

  %APPDATA%/Sublime Text 2/

These are the default paths for the Installed Packages, Packages, Pristine Packages and Settings directories used by Sublime Text 2.  They can be copied to the same respective location on another computer.  I happen to use a combination of symbolic links and Dropbox to sync these files between my Mac and PC.  Information for setting up that sort of sync is available online  .

According to this post , this isn't currently possible in ST2.