Ark7 - Choose a property and invest in shares
Unity - The multiplatform game creation tools for everyone.
Peerstreet - Finances real estate through a form of crowdfunding.
Godot Engine - Feature-packed 2D and 3D open source game engine.
RealtyShares - Real Estate Investing in 20 Minutes
Blender - Blender is the open source, cross platform suite of tools for 3D creation.