https://www.openfest.org/2016/en/2016/07/25/call-for-speakers-is-now-open/ OpenFest is the only conference of its kind in Bulgaria, dedicated to open culture, free and open-source software, the free exchange of knowledge - a festival of the open culture. Mon, 25 Jul 2016 10:10:45 +0000 hourly 1 https://wordpress.org/?v=5.2.20