A client for administering VirtualBox and it's guests on a server
RemoteBox is a VirtualBox client. In essence, you can remotely administer (ie over the network) an installation of VirtualBox on a server, including its guests and interact with them as if they were running locally. VirtualBox is installed on 'the server' machine and RemoteBox runs on 'the client' machine. RemoteBox provides a complete GTK graphical interface with a look and feel very similar to that of VirtualBox's native GUI. If you're familiar with other virtualization software, such as VMWare ESX, then think of RemoteBox as the "poor man's" VI client.
virtualcontrol is a configuration and monitoring tool for QEMU/KVM instances on a linux box. virtualcontrol primarily uses the KVM command line tools to do its job. Apart from trivial functions like starting and stopping virtual machines, virtualcontrol also allows freezing/thawing virtual machines (snapshot including memory dump), KVM machine migration and advanced storage functions like HA and dedicated storage solutions (OpenSANd).
FreeBlade is a tool that allows to combine multiple independent linux servers running QEMU/KVM instances into a blade server system. On each node, FreeBlade controls the local virtualcontrol, OpenSAN and httpvnc services in a global context.