Not open source and also not exactly free (2 of the 48 styles are freely available). Still, pretty reasonably priced as far as fonts go: https://www.fontfabric.

Not open source and also not exactly free (2 of the 48 styles are freely available). Still, pretty reasonably priced as far as fonts go: https://www.fontfabric.com/fonts/averta/ https://www.fontfabric.com/fonts/averta/