If your goal is truly to run CAD software without installation, here are :
: Users can connect their designs to real-world locations using a coordinate system library. You can insert live map data directly into the drawing area by entering an address or dropping a marker. autocad 2014 portable google drive link
: Offers a free version that feels very similar to the classic AutoCAD interface. lightweight CAD tool for a lower-spec computer? If your goal is truly to run CAD