wxWidgets - wxWidgets: Cross-Platform GUI Library
deltaDNA - deltaDNA is a real-time game analytics and marketing platform.
Electron - Build cross platform desktop apps with web technologies
ClubLinq - ClubLinq offers casino accounting, POS, PMS, CRM and casino management solutions.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.
Casa BI - Casa Gaming Systems provides cloud based business intelligence, kiosks, service management and operational tools for Casino operators.