Limbo x86 PC Emulator

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 https://f-droid.org/packages/com.coboltforge.dontmind.multivnc or https://f-droid.org/packages/android.androidVNC
clients available in F-Droid.

On android devices with x86-based CPU (Intel Atom), Limbo can run with
KVM mode, allowing for much better perfomance.

Keep in mind, limbo is a complete emulation of another CPU architecture,
so you most likely won't be able to run modern operating systems
with reasonable perfomance.