c-plus-plus gplv3 weather-app weather-application gpl3 c-plus-plus-lang c-plus-plus-language blueberryos blueberryos-project blueberryos-development blueberryos-operating-system-project blackberryos-alternative blackberry-alternative blueberryos-apps blueberryos-applications blueberryos-apps-weather blueberryos-weather-app blueberryos-weather-app-project blueberryos-weather-app-development blackberryos-weather-app-alternative