I saw this tool today, and while it has been around for a bit version 2.0 just kind of came out. Its really quite a nice tool, comes with a bunch of 3D models, exports to every format, and can be used to procedurally generate content as well as make 2D sprites from the models. If you are looking to make quick models for a game I would suggest checking it out:
Can anyone find what blocks are only in the deluxe version?
You can create your own blocks and import them as the website states. For me the deluxe version would not be worth then.