You can view .dwg files with Autodesk DWG TrueView Free software, a free stand-alone .dwg viewer with DWG TrueConvert software included.
The Autodesk DWG Trueview is a design programme aimed at engineers and architects, as a means of easily viewing their designs. The programme is useful for users as it allows you to view, print and publish DXF and DWG documents from design software such as AutoCAD. It also lets you measure drawings accurately, share drawings and change their frame, shadowing, zoom etc and is an easy to use and, perhaps most importantly, free programme with a clean and simple interface.
Pros: Freeware, lets you share graphics and drawings created with AutoCAD, lets you publish DWF files in 3D, lets you track your changes, fast user response, compatible with new and old versions of AutoCAD, easy to use for non-industry users.
Cons: No updates, took a long time to download, no ongoing support, associates filename extensions needlessly with the programme, basic no-frills interface, trouble with installation could be down to incompatibility with updated Microsoft .NET framework.
Conclusion: Autodesk DWG Trueview is a great programme if you want to view, print and publish your documents in a simple, no frills manner or if you're wanting a quick fix programme for free. There are better pay-for design programmes out there for engineers and architects but this is a good backup for users home or portable computers.