spice

Virt Viewer provides a graphical viewer for the guest OS. Supports guest OS VNC/SPICE

VDI client for Proxmox VE — SPICE and RDP remote console launcher

Launching SPICE remote-viewer for Proxmox VE

Spice is a statically-typed, easy to use and compiled programming language. It supports cross-compilation and is especially useful for programming close to the system.