Here is a new search engine made specifically for DWG and DWF files. cadbot is the new kid on the block, contribute your dwg files so that others can benefit from it. What Happen to CAD Monkey?
p.s. Do you know that you can search for dwg files using Google?
It can be anything, simply replace the dwg with any file extension you want to search. For example searching for a PDF file would be “filetype:pdf”
