Laplink ShareDirect Basic is now free. ShareDirect provides direct file sharing of an entire folder over the Internet with authorized users.

ShareDirect Plus sells for $70 and offers "Premium Connection" that enable connection through virtually all routers and firewalls.

Version 1.3 feature List from their web site:
" * SpeedSync™: Enjoy faster document transfer with SpeedSync® technology, which transmits only the changed portion of documents. Perfect for large media assets.
* Integrated, Secure Messaging: Communicate in realtime with individual ShareDirect members. ShareDirect messaging is protected by 256-bit encryption - the highest level commercially available.
* Online/Offline Awareness: See which of your contacts and their documents are online and accessible at any time.
* Group Functionality: Organize members under editable group headings. Copy or move members across several groups with drag-and-drop simplicity and send convenient group invitations to share a folder.
* Online Help and Tutorials: Access online voice/text chat tech support and tutorials.
* Proxy Support: Share your folders and files with ShareDirect even if your computer uses a proxy server to connect to the internet."