Dropbox

Dropbox is a file hosting service operated by American company Dropbox, Inc., that offers cloud storage, file synchronization, personal cloud, and client software. Dropbox allows users to create a special folder on their computers, which Dropbox then synchronizes so that it appears to be the same folder (with the same contents) regardless of which device is used to view it. Files dropped into ~/Dropbox folder will automatically sync to centralized repository. Files placed in this folder are also accessible via the Dropbox website and mobile apps.