SolusVM - Solus Virtual Manager (SolusVM) is a powerful GUI based VPS management system with full OpenVZ...
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
VMmanager - VMmanager is a QEMU/KVM server virtualization management software, which presents perfect tools for creating virtual machines, providing VPS services, and building cloud infrastructure.
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
Xen Orchestra - A complete web UI for controlling a XenServer or Xen infrastructure.
AOMEI Backupper - AOMEI Backupper is a software created to help a person backup, restore, clone, and sync their entire Windows system.