2D DXF Viewer is described as 'The 2D DXF Viewer is a standalone application that is capable of opening and reading the contents of DXF files. The viewer make use of GPU-accelerated rendering, which is about 100 times more than the average modern desktop CPU'. There are three alternatives to 2D DXF Viewer for Mac, Windows, Linux and Online / Web-based. The best alternative is DXF View. It's not free, so if you're looking for a free alternative, you could try de·caff DXF Viewer or ODA Viewer.
The viewer reads 2D and 3D ASCII and binary DXF files (which may even be packed with zip, gzip and bzip2, but you should prefer zip), and understands a noticable subset of the features of newer DXF versions.
ODA Viewer incorporates the power and flexibility of ODA into a single application that can visualize all ODA supported file formats and illustrate other visualize-related features like visual styles and markup.