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.
CloudMe - Key Features: - Access to all your files and folders in CloudMe. - From 3GB (free) to 500 GB (paid) of file storage, accessible directly in your device. - View photos, videos, and documents wherever you are.
Google Drive - Access and sync your files anywhere
qube-os - qube-os is a Cloud Computing Operating System. it completely web based.