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.
VSquare - Vsquare is a Vmware and Hyper-V-based data protection, disaster recovery, and business continuity solution that provides businesses with a complete, affordable solution for protecting their data and ensuring continuity in the event of a disaster.
Bacula Enterprise - A physical, virtual and cloud data center backup software for data centers. Bacula Enterprise Edition is the best open source backup software.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
CloudEndure - CloudEndure provides cloud migration and cloud disaster recovery for any application.
Veeam Backup - Backup and restore VMware and Hyper-V virtual machines with Veeam Backup Free Edition. Unlimited hosts and VMs. Free forever.