Retrospect - Retrospect Backup: Data Protection for Small Businesses. Windows, Mac, Linux, VMware, Hyper-V, Exchange, SQL, and Email. Servers and endpoints. Try for free for 45 days.
FileHamster - Personal Revision Control - File Hamster - File and Document Revision, Retrieve and Restore
Bacula Enterprise - A physical, virtual and cloud data center backup software for data centers. Bacula Enterprise Edition is the best open source backup software.
ForeverSave - Data loss, caused by application crashes and unintentional overwriting will become history.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
AutoArchive - AutoArchive is a simple utility to help create backups more easily.