http://www.autodesk.com/products/autodesk-autocad/free-trial
http://www.autodesk.com/products/autodesk-autocad/features/all/gallery-view
http://www.autodesk.com/products/autodesk-autocad/features/all/gallery-view
These are just some of the new and enhanced features in AutoCAD 2015, New Tab Create and Learn pages, dark theme interface, updated status bar, additional contextual ribbon tabs, smooth line display, lasso selection, new cursor badges, preview for drawing editing, enhancements to model space viewports, orbit target point placement, Geographic Location, and more.
Source: Autodesk