Dropbox - Online Sync and File Sharing
WholesaleBackup - WholesaleBackup is an online data backup service provider that turns your system into a backup server, allowing you to host the backup data on your own Windows Server environment.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Data Deposit Box - Backup all of your PCs, Macs and Mobile devices into ONE account.
Google Drive - Access and sync your files anywhere
Online Vault Backup - Online Vault Backup is a cloud storage service that allows you backup your data while having unlimited storage.