VMware Workstation Pro, Proxmox Virtual Environment, VMware Workstation Player, Virtualizor, VMware Fusion, Xen Orchestra, Archipel, SolusVM, VirtEngine, ASG-Remote Desktop, Danube Cloud, oVirt, WebVirtMgr, Cloudmin, Fleio, Virtkick, Cloudmatic, Feathur, HyperVM are some alternatives to VMmanager.