Limbo is a qemu-based x86 architecture emulator for android devices. With limbo, you can emulate a complete desktop computer on your device and install various systems (FreeDOS, Windows, KolibriOS, various GNU/Linux distributes and any other x86-compatible OS).
Limbo has a wide selection of settings, allowing you to change available RAM, number of emulated cores, type of CPU, mount hard-drive and cd-rom images, select emulated graphics, network and audio card types and many more.
Access to the emulated desktop is done inside limbo with the inbuilt VNC viewer, SDL mode or an external VNC. To connect to an external VNC, you can use com.coboltforge.dontmind.multivnc or android.androidVNC