Proxmox VE - Proxmox is an open-source server virtualization management solution that offers the ability to manage virtual server technology with the Linux OpenVZ and KVM technology.
When I Work - When I Work is an employee scheduling and communication app using the web, mobile apps, text messaging, social media, and email.
Hyper-V - Install Hyper-V on Windows 10
Deputy - Deputy is a software for employee scheduling, time and attendance and communication management.
Azure Virtual Machines - Build Linux and Windows virtual machines (VMs) and save up to 80 percent with Azure Reserved Virtual Machine Instances and Azure Hybrid Benefit for Windows Server.
ResourceGuru - The fast, simple way to schedule people, equipment, and other resources online.