Company Selleo created these great apps:
The Open Source Days, SmartDevCon, PHPCon Poland 2014, PolyConf, Humanitarian Congress Berlin, dBConf, Jesień Linuksowa, IT Academic Day Bielsko-Biała, ŚTP - Zamek Cieszyn, ŚTP woj. śląskie, Dare Festival, Humanitarian Congress Vienna, Smog Alert Silesia, and others..
