to my knowledge there is no such project public available. You'd need to port a project yourself
How did I know you were going to say that?
First of all I'm the fellow insisting this is not possible. It don't sound reasonable to ask me to do something I'm saying can't be done. If FC firmware were successfully implemented on a 25 cent chip like 003 it would be big news rippling across the globe. Not only the main subject on sites I frequent like multiwii.com and diydrones.com but probably make front page NY Times.
This is not "developmental" or a niche market. Between commercial entities like Syma, WLT, Hubsan, etc. and hobby grade products from the DJI, Hobbyking, bangood, and others we are talking billion dollar sales. These have been the top playthings every year for at least the past six years starting with the low cost IMU sensor revolution. First the heli phenomenon with cheap murata piezo clones then widespread availability of mems devices. Big sales, big money, big news.
Secondly I do have some experience in this area. After experimenting with the top dozen or so DIY platforms and more than one failed attempt at "bare metal" I have a pretty good idea of what's involved. Both in terms of effort and MPU resources. So I have to laugh at the way danny tucks in the word "algorithm" as though it's another blinky and:
Coding is super easy.
LOL. I'm not as impressed by all the photos of an LED with keyboard backdrop as apparently everybody else. Why bother? They all look the same and could be just wired directly to VCC under the board. IMO links to functional toolsets and actual working programs would be far more helpful than cryptic code snippets and unbacked claims. More so than all this "look how smart I am" stuff. Not that I mind that but maybe reinforced with a little hard evidence.