Adobe are giving you the chance to trial Photoshop CS6 Extended.
According to the site:
Photoshop CS6 Extended delivers all the state-of-the-art editing, compositing, and graphic design capabilities in Photoshop CS6 plus breakthrough tools for 3D design and scientific analysis. The trial version is fully functional for 30 days and offers unlimited access to the feature set in Photoshop CS6 Extended.
To get your free trial follow the links onsite.
There is no expiry date listed and the offer may be ongoing.Click to get this offer