Quiet Sans

Quiet Sans is a super geometric sans-serif family for text designed by Ryoichi Tsunekawa, and the whole family consists of 6 weights from ExtraLight to ExtraBold and their matching Italics. 
The basic concept of this family is not only to make a crisp, sharp, and strong impact by geometric letter form but also to be legible and readable even on small size screens by their sophisticated design. 
Quiet Sans supports almost all European languages: Western, Central, South Eastern Europeans, and Afrikaans. 
And proportional figures, superior figures, inferior figures, denominators, numerators, fractions, ordinals, and case-sensitive-forms can be accessed by using OpenType features.