ClassVR - VR Training Simulator
wxWidgets - wxWidgets: Cross-Platform GUI Library
REWO - REWO is a knowledge documentation and distribution solution, which drastically improves capturing, visualizing and communicating knowledge.
Electron - Build cross platform desktop apps with web technologies
Mursion - Mursion is paving the way for more effective training and learning solutions through immersive virtual reality environments with customized software.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.