Developer website: davtri.com
Davtri HTTP Scanner is a scanner that can scan a single host, a comma separated list of hosts or an entire subnet for all machines that are running an http server on any of the common and many uncommon ports. For ever server it finds, it attempts to "fingerprint" (identify) what the server software is that is running on that port. The application also allows you to save the report to either a "raw" file for use in scripts or automated parsing routines or in a valid, styled, xhtml file that is very easy to read.
Mac OS X 10.3 or later