What would the night sky look like if we replaced the Moon with planets in the Solar System?
Planets by Earth shows you, best viewed in VR.
Tired of seeing yourself in that video conference? Be an animated SVG character brought to live with TensorFlow and Pose Animator.
If the price tag of robot dog Spot is too steep for you, Stanford's Pupper might fit in the budget.
Marc ten Bosch (of Miegakure fame) does a very convincing job of explaining 4D objects in 3D space.
Try to dock to the ISS with this simulator from SpaceX.