Windows Live Sync (formerly known as Windows Live FolderShare) is a free-to-use application by Microsoft that is designed to allow files and folders between two or more computers be in sync with each other on Windows (XP and later) and Mac OS X based computers, similar to Live Mesh’s data synchronization services.
A maximum of 20 folders (or “libraries”) may by synced, including libraries shared over the internet. Each library can contain a maximum of 20,000 files and each file cannot exceed 4GB.

Linux is a clone of the operating system Unix