Raleway
The League of Moveable Type · Matt McInerney, Pablo Impallari and Rodrigo Fuenzalida · 2010

A nine-weight elegant sans that grew from a single thin display weight into one of the most widely used open-source families around.
About
Raleway began life as a single thin display weight and was expanded, community-by-community, into the nine-weight family in circulation today. It carries both old-style and lining numerals, standard and discretionary ligatures, a fairly complete diacritic set and a more geometric stylistic alternate alongside its neo-grotesque-influenced default character set.
Classification
An elegant sans-serif that began as a single thin display weight and was expanded by the open-source community into a full nine-weight family with a geometric-leaning stylistic alternate.