Console OS Free (Was $10) - Android OS for Intel Core 2-in-1's
I was a Kickstarter backer for this, and a fan. I use it on my Dell XPS 12 and Yoga 2 13's with gusto. I've never had Android apps play/run this well, and the tech demos they have on their wiki really show what's ahead for Android. Dual-boots with Windows 8.1 no problem.
But just to keep expectations realistic, it's still beta-quality. That said, it was $10 and now it's free. Don't know when they will cut it off, I suspect when they start shipping Lollipop.
Android IA (look at ConsoleOS's source, it's cloned from here, they even forgot to change some of the labels, and broke some stuff in the "porting" process)
Details for natives:
KitKat Android IA (https://01.org/android-ia) supported devices (must have 64-bit bootloaders):
All Ivy Bridge, Haswell, Baytrail PCs
Lollipop Android IA:
KitKat/Lollipop Android x86 (https://groups.google.c
Device dependent, like how XDA works with custom ROMs. If one person compiling it has a particular device, he/she will compile for that device.
That said, it supports most devices with 64-bit bootloaders (including AMD CPUs).
32-bit devices I know of: Dell Venue 8 Pro (me, yes there's Lollipop as well), Asus T100 (main developer), probably some others (search on the Google groups).