The Averia GWF families of fonts are based on the average of all fonts
in the Google Web Fonts project, released under the SIL Open Font License,
as of 9 Nov 2011.

Averia GWF exists in Regular, Bold, Italic, Bold Italic, Light and Light
Italic styles - as well as a "Gruesa" semi-italic variant made from an
average of all 725 source fonts.