RemoteBox is a client for administring guest VMs on a VirtualBox server. It provides a complete GTK interface similar to VirtualBox itself, and allows direct interaction (RDP) with the running system from a remote "client" machine. All system / virtualization properties can be influenced, devices edited, networking setup changed, and VM snapshots be made.
Thinstation is a small Linux distribution for basix x86 hardware that provides thin client setups, suitable for school setups. It provides connectivity for RDP and VNC connections, works as Citrix/ICA client, standard X11, NoMachine NX, Windows RDP, tb5250, Tarantella, VMS terminal, or just SSH/telnet client. It allows network booting via PXE, syslinux, CD-ROM, or flash/USB installations.