3D bedroom?

I'm moving and want to see my new room in 3D on the computer. I've taken measurements of all the nooks and crannies along the floor, the window height, and now I'm just waiting for a program to input the numbers. I want to insert a couple objects like -- the bed, the dresser -- nothing too articulate, I'd be happy if the program just let me insert just boxes. I want to move the camera left right up down, and possibly see some basic lighting and shading effects. I don't even need textures.

What do I need!? Free would be nice :)