MicroSurvey provides a free dwg viewer and upload/download utility known as MicroSurvey Data Exchange.  It is available from this link.  You or your clients can use this to view the contents of drawing files, the survey database and your traverse files on any computer.

Autodesk also provides a free utility which many offices or their clients may wish to make use of:

It is called DWG Trueview, and you can download it from this link

This is a handy utility to have, as it will allow you to:

• View 2013 or newer drawings without modifying the survey database.
• investigate issues with missing image or externally referenced files.
• Print on paper using your existing ctb files (see here for how to use your printstyles)
• Convert 2013 format dwg files to older formats by opening the program and then select "DWG Conversion" from the main menu.