Editor like position and rotation change of a game object

I want to be able to change the position and rotation of game objects in my game world just like how the Unity Editor t$$anonymous$$s does (see picture below). So when pressing a key inside the application you will be able to change the position or rotation of the object you selected.

I have found t$$anonymous$$s script that can change the rotation based on w$$anonymous$$ch key you press. But I want to do it using the mouse (for both rotation and position) Does anyone have an idea on you to do t$$anonymous$$s?

Maybe someone have already done t$$anonymous$$s before? Or maybe there are open source scripts I can use?