QEMU

QEMU is an open source that can create and manage virtual machines to run guest operating systems. ARM, Intel, and PowerPC are among supported hardware platforms. 68K is only supported as a guest platform.

Emulation
QEMU can employ emulation if the guest software was written for a different processor family than the host hardware. The dynamic recompiler in VirtualBox from is derived from QEMU.

Forks to run iOS
There have been forks of QEMU related to emulating iOS devices in QEMU, with varying degrees of success:
 * In late 2022, internet user Martijn de Vos (known online as devos50) created an unnamed fork of QEMU to emulate the 1st-generation iPod touch using past work provided by the previous QEMU forks, iEmu, xnu-qemu-arm64, and TruEmu, as well as OpeniBoot. It can successfully boot iPhone OS 1.1, build 3A101a. Like touchHLE and clicky, the U.S. 's reverse-engineering tool was used.

Hoaxes

 * A TikTok user claimed to have ported the iOS fork to Android, but did not provide any instructions nor source code. The same user also claimed to have ported it to run in web emulation. However, these "ports" were found to have been faked through the use of a VNC client.