1. Autodesk 360 Mobile This is a great application for keeping up with data located on the Autodesk servers. iOS: Download Android: Dowload 2. PDF Max Pro This app is a must have for me. If you need to take notes or review a set of plans, this PDF viewer will get the job done. Site: Here iOS: download Android: Coming Soon! 3. OnLive Desktop If you ever wanted to run Windows 7 on an iOS or Android device, this handy app can do the trick. Site: Here iOS: download Android: download 4. Turbo Viewer Turbo Viewer is a nice drawing viewing application to have when you don't have internet access to your device. The ablillity to view both 3D and 2D drawings on the go is a big plus. Site: here iOS: download Android: download 5. GoodNotes This is not just another PDF viewer, this is the best one for CAD users. The abillity to review a pdf files on the go is helpful, but this app gives you the best way to hightlight comments after updating the drawing file.