If you've ever wanted the means to easily construct something for your 3D printer or have just wanted something simple and easy to utilize in your quest to satiate your 3D design cravings, TinkerCad may be exactly what you were looking for. Built with the latest WebGL technology, Tinkercad will, well, let you do precisely what I've mentioned above. Its usage from a development front is probably somewhat limited but it's still an interesting diversion. I particularly liked what they've done with the tutorial system - it's hard to go wrong with gamification, really.

Those curious about TinkerCad can check it out here.