There is a special that ends today where you can purchase Autodesk Fusion 360 on Amazon.com for only $25 when it is normally $25 a month! Fusion runs on Mac and PC as well as the cloud.
http://www.amazon.com/Autodesk-Fusion-Service-Subscription-Available/dp/B00WGXGP5S

I am writing this from my phone in the airport parking lot as I am traveling to Autodesk University in Las Vegas. I hope to see you there!

Cheers
Shaan