Open source FeelHome provides simple, cross-platform remote access to your files
The open source server app is available for Linux, Mac, and Windows (Windows users can choose between an installer or a portable version). Register for an account, launch the server and sign in via SSL, and you can access files on your local hard drive anywhere via your web browser (also SSL encrypted). FeelHome is totally free to use -- there's no charge for the software, accounts, or accessing the web interface.
Access can be restricted to whatever local folder you choose (and its subfolders), or you can leave things wide open (which allows opening parent folders). Files can be browsed in two different views: Explore and Virtual Desktop. Virtual Desktop mode comes with three OS-inspired themes and a handful of different wallpapers to choose from, but functionally it's the same as the Explore view. Click to open a folder, click .. to go up a directory. Need to send a file back home? Upload it to your remote desktop by clicking the up arrow icon.