http://www.myfonts.com/fonts/cretype/segaon-soft/

This family is the rounded version of Segaon family. Segaon Soft Family is a humanist sans-serif typeface that is clean, simple and highly readable. The spaces between individual letter forms are precisely adjusted to create the perfect typesetting.Segaon is versatile type family of 18 fonts. Segaon family consists of 9 weights (Thin, ExtraLight, Light, Regular, Medium, Bold, ExtraBold, Heavy & Black) with their corresponding italics.The Open Type fonts contain complete Latin 1252, Cyrillic, Central European 1250, Turkish 1254 character sets. Each font includes old-style figures, proportional figures, tabular figures, numerators, denominators, superscript, scientific inferiors, subscript, fractions and case features. We highly recommend it for use in books, web pages, screen displays, and so on.