Servertest 1.0.

Servertest 1.0. - from Dan Bricklin - lets you monitor how one or more web sites respond to requests for web pages over a long period of time, showing an indication of average response time and pattern of timeouts.

Written in Perl, and can run on most computer systems (Windows, Mac OS X, and Linux),also available in source form for modification, enhancement, and redistribution (subject to a license).