clearVM is described as ', formerly Witsbits, enables you to set up your servers with virtualization and deploy virtual machines faster than ever before' and is an website in the Network & Admin category. There are more than 25 alternatives to clearVM, not only websites but also apps for a variety of platforms, including Linux, Windows, Mac, BSD and NVIDIA vGPU. The best alternative is VirtualBox, which is both free and Open Source. Other great sites and apps similar to clearVM are QEMU (Free, Open Source), KVM (Kernel-based Virtual Machine) (Free, Open Source), virt-manager (Free, Open Source) and Proxmox Virtual Environment (Freemium, Open Source).
KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.
Xen.org, home of the Xen hypervisor, the powerful open source industry standard for virtualization. It is a native (bare-metal) hypervisor providing services that allow multiple computer operating systems to execute on the same computer hardware concurrently.
Portable-VirtualBox is a free and open source software tool that lets you run any operating system from a usb stick without separate installation. It unpacks and adjusts the paths and configuration of VirtualBox so it will run portably.
oVirt is a virtualization management application. That means that you can use the oVirt management interface ( the oVirt engine) to manage hardware nodes, storage and network resources, and to deploy and monitor virtual machines running in your data center.