See main features with DWF viewer interface Here 
Here we strongly recommend you a fast DWF Reader, allowing to view, browse, measure and print DWF files without AutoCAD. With the Pro version, you can markup your DWF files with text, lines, shapes with customizable color and the markup manager. Another great features offered by this DWF file viewing tool is to compare two reversions of DWF files to find the differences. Two versions are offered for you and let's know about features of Professional Autodesk DWF Viewer first:
Features of Professional DWF Viewer
Allow to open DWF file, DXF and DWG files by this .dwf viewing tool.
Supports AutoCAD drawing format from R2.5 to the latest version 2012.
Rich view tools such as zoom, pan, fit window, next page...
Brower to browse all your drawings in hardware.
Compare two reversions of DWF files to find differences.
Markup tools to modify DWF files such as text, lines, rectange, shapes...
Export CAD files to PDF ,DWG to JPG, DWG to TIFF, DWG to GIF Conversion.
Measure length and area with smart snap.
Publishing markup in PDF or image format(Pro version only).
DWF Viewer can run in full screen mode.
Free download to open DWF files easily.
See main features with DWF viewer interface Here 
View tools to open DWF:

You can use pan, zoom rectangle, zoom in , zoom out, fit window, next page to view your DWF file conveniently. Besides, you can rotate it by 90, 180, 270 degrees.
Use the browser to browse all the DWF or other CAD files on your hardware with thumbnail. You're allowed to :
view your DWF in 4 modes: thumbnail, list, icon, detail.
Set the size of thumbnails.
Search and find text in files.
Folders bar, status bar and tool bar setting.
One click to swich between the view mode and browse mode quickly.
Measure and Markup tools to mark DWF file

--Measure tools: measure, caculate polygon area, Dimension settings, liner, aligned , angular or Radius.
--Markup tool: Free red line/polyline/rectangle; Text (like PDF note); Rectang markup, cloud markup, Ellipse markup and round rectang markup. / Markup manager allowing you to move, delete and edit properties of added markup like title, author, content and settings like colour/font/bg colour/line height.
Click the second button from the back to see markup manager features:
Compare Reversions of a DWF file with DWF Viewer
Find differences between two revisions of an AutoCAD drawing.
Display the differences in views, using contrasting colors for added entities, deleted entities and modified entities.
Synchronously zoom the result drawings.
Synchronously locate the selected entity when you click the result report list.
Comparison of the contents of configuration.
Click
compare DWF button to add two files for the comparation and set the color and compare option. Then you'll come to the comparation interface.
What's more with DWF viewer?
This DWF Reader is more than a viewer. You can use it to batch print CAD files and set print layout with preview supported; You can batch convert CAD files to PDF and Images formats; You can copy and mail your CAD files ... More functions waiting for you to search!
We offer you a lower price standard version of this viewer with less features.
| Features | Professional |
Standard |
| View DWF (.dwf .dwg .dxf ) | Y |
Y |
| Print, print scaling,penwidth set | Y |
Y |
| Markup | Y |
Y |
| Measure length,area,perimeter | Y |
Y |
| batch plot dwf dwg | Y |
|
| markup publishing in PDF and iamges | Y |
|
| CAD files to PDF conversion | Y |
|
| CAD files to image conversion (jpg, tiff, png, bmp, gif" | Y |
X version is an active control to view DWF files with features:
1. Ability to loading both http file and local file. for example:
dwgViewX.DrawingFile = "http://www.autodwg.com/dwg-viewer/Office.dwg" or
dwgViewX.DrawingFile = "c:\drawing files\Office.dwg"
2. Supports both DWG, DXF and DWF file;
3. Supports AutoCAD version from R2.5 to the latest version 2012.
Caution:
Users
Price/User
Total Price
30 Licenses Max
$10.00
$300
100 Licenses Max
$6.00
$600
200 Licenses Max
$4.00
$800
300 Licenses Max
$3.00
$900
Unlimited License
--
$1200
Server License
(e.g. for a web server)
--
$680