Dropbox - Online Sync and File Sharing
CloudTop - CloudTop is an online cloud web desktop.
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Doky - Doky is the Cloud Operating System Web 3.0 based on open-source .
Google Drive - Access and sync your files anywhere
eyeOS - eyeOS is a web desktop following the cloud computing concept that seeks to enable collaboration and communication among users.