I received a gdb of a water system. The system is in meters. I have an engineer that is going to need to work read the data in another piece of software. That software works in feet. Is there a way for me to convert this data to feet? I know I can display it in feet in arcmap, but as far as another software using it, I'm just not sure.
You can do your entire map fairly painlessly using the Project tool in batch processing mode. This will open a batch processing grid into which you can drag and drop the desired layers from the table of contents.
edit: apparently this functionality is so popular that there is a Batch Project script tool packaged with ArcGIS (at least at 10.1).