https://www.openfest.org/2018/en/2018/11/01/childrens-playground/ 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. Wed, 31 Oct 2018 22:28:12 +0000 hourly 1 https://wordpress.org/?v=5.2.20