https://www.openfest.org/2019/en/2019/06/12/call-for-participation/ 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. Thu, 19 Sep 2019 11:08:45 +0000 hourly 1 https://wordpress.org/?v=5.2.20