The City of Dover offers online access to City maps and property record cards at http:
page Card 222 maps
Purple Pen is a Windows application. If you do not have this installed on your machine, the installer will automatically download and install it onto your machine. Please send your feedback to the Purple Pen mailing list.
October 31, Instructions for how to help translate Purple Pen to other languages has been posted here. May 23, Version 2. Mar 28, Version 3. July 23, Version 2.