VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
Unity - The multiplatform game creation tools for everyone.
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.