Have you heard of Cyanogenmod
Cyanogenmod is a variant of Android that are developed independently from Google. And
And are called by many as RAW system of Android
Its start 2009, with $ 7 million in funding, and it was to ensure that Android continued to be open source.
According to Steve Kondik, the founder of the system, then Peter Levine from A16Z go to the Board of the company and they will use the money to increase the development team.
Read more about it on Wikipedia?