Effra Font Free Download. The Effra font family has its roots in one of the earliest sans-serif designs commercially available, Caslon Junior, from 1816. Our design is updated for contemporary use. It has been expanded to our Standard character set. Similar free fonts and alternative for Effra Light - NotCourier-sans, Raleway Light, SanFrediano-Light, Sansumi-DemiBold, Vegur-Light, Walkway Upper Bold, AbsolutP.