Recommend a platform for developing 3D applications?

Question

3D

Hello.
Tell me a platform for developing 3D applications. The general essence is such that there is a set of tools and a viewing area, a 3D object is displayed in this area, the tools allow you to perform various manipulations with it (rotate, scale, etc.)
The general interface will look something like this:
techcourses.ru/wp-content /uploads/2014/08/vidavliv...
Requirements:
- work on Windows
- 3D hardware acceleration (OpenGL/DirectX)
- the ability to make an adequate UI
- the ability to screw Multitouch
Wish:
- the ability to write in C #
- cross-platform (Linux\Android)

Answer 1

unity