LineageOS - Operating system for smartphones and tablet computers, based on the Android
Android-x86 - Run Android on your PC.
GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
Phoenix OS - Installs android on computer. Based on android-x86
Pixel Experience - PixelExperience is an AOSP based ROM, with Google apps included and all Pixel goodies (launcher, wallpapers, icons, fonts, bootanimation).
BlueStacks - BlueStacks is a website designed to format mobile apps to be compatible to desktop computers, opening up mobile gaming to laptops and other computers. Read more about BlueStacks.