OpenGL apps running inside a Virtual Machine (VM) can use VMGL to take advantage of graphics hardware acceleration. VMGL can be used on VMware guests, Xen HVM domains (depending on hardware virtualization extensions) and Xen paravirtual domains, using XVnc or the virtual framebuffer. Although we haven't tested it, VMGL should work for qemu, KVM, and VirtualBox. VMGL is available for X11-based guest OS's: Linux, FreeBSD and OpenSolaris. Finally, VMGL is GPU-independent: we support ATI, Nvidia and Intel GPUs.