NiftyName is a system for creating and managing virtual machine pools and all related components such as storage, private and public networks. It is intended to be used as a free alternative to Amazon EC2 and Microsoft Azure. All components have been designed for multi-site active redundancy, though this is not supported yet. Its architecture is based on documented XML-RPC (SSL) Web services, so you can make your own derivative tools for it. Console and GTK+ client applications are provided. VMs are based on KVM. It supports IPv6, private VLANs, multiple interfaces, user/client management, permissions, and roles.
vidma is a utility for manipulating virtual disk images. It can show basic information about the image or resize it. Resizing is done by in-place modification of a file holding the image or by creating modified copy of such file. The only currently supported format is VDI (Virtual Disk Image), mostly used by VirtualBox.
VDE (Virtual Distributed Ethernet) is an Ethernet compliant virtual network that can be spawned over a set of physical computers over the Internet. VDE is part of the virtualsquare project. VDE includes tools such as "vde_switch" and "vdeqemu". vde_switch provides several virtual ports where virtual machines, applications, virtual interfaces, and connectivity tools can be virtually plugged in. vdeqemu works as a wrapper for running qemu virtual machines that connect transparently to a specified vde_switch. VDE is also supported by qemu-kvm (KVM, Linux Kernel Virtual Machine) in versions 0.12.4 and later using the -net vde command-line option.