Windows Live FolderShare
is a great, easy way to keep your files synced between multiple devices. With FolderShare, you create a private peer-to-peer network that syncs your files and lets you share them with colleges and friends. You no longer need to worry whether your files, photos, or videos are on your home PC, your laptop, or your work computer. FolderShare keeps them all in sync, letting you access them from any computer set up with FolderShare or any web browser - even the browser on your mobile device! Files can be up to 2 GB in size, there are no limits on the quantity or size of files transferred, and all file formats are supported.
The software's sharing feature is an easy way to send others large files - no more trying to zip files to get them through email, burning to CD/DVD, or uploading to a website. To use FolderShare, you must download and install the FolderShare Satellite - the software that is installed on the device(s) you want to sync or share files with. This software runs in the background and automatically updates your files on the other connected devices. The software, part of Windows Live Services, works on Windows 2000, XP, Vista, or OSX and it's completely free! FolderShare can be downloaded here