After 5 years, Google’s new massive open dource font family is here!
Noto, which stands for No More Tofu (riding the web of blank characters aka tofu), covers over 800 languages and 110,000 characters! This covers every symbol in Unicode standard as of today.
You can download them today here, and please note it is 472MB. Though you can hunt through all the languages and just download what you want.