Installation and documentation
Installation ist realy simple.
You can either install SymfonyCommander with Package Control (recommended), pull it via Github or download a zip file with the latest release.
You can find all technical Information at Github.
Sublime Text is available for OS X, Linux and Windows. Because SymfonyCommander is just a Package for Sublime Text, you can use it on all major plattforms as well.
SymfonyCommnader is published under the MIT License. So just use it, fork it, love it.