BookWidgets - BookWidgets is an excellent application that let you create engaging exercises in minutes and easily share a varied variety of beautiful and fun activities with your classroom and others.
Unity - The multiplatform game creation tools for everyone.
Padlet - Visual boards for organizing anything.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Socrative - Socrative helps teachers engage the class with educational activities to measure and visualize...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.