HTML reports can be generated during the load to view response times measurement, server CPU, etc. Loadster - Load testing tool from Brickyard Technologies, Inc.
oriented to testing websites, web applications, and HTTP web services; includes graphical script editor, live reporting, and unlimited virtual users.
The tool is useful in scenarios where the requests have high response times.
Core engine is protocol agnostic enabling support for other protocols - currently also ships JMS support.
Load Gen - An open source load testing tool by Stanly Thomas and Mythili Vutukuru, developed as a web app.
Developed based on fiber, a user-level thread implementation in Java.
Check listed tool/vendor sites for latest product capabilities, supported platforms/servers/clients, etc; new listings are periodically added to the top of each category section; date of latest update is shown at bottom of this page.
Also see Web Site Testing FAQ in the FAQ Part 2 for a discussion of web site testing considerations; also see What's the best way to choose a test automation tool?
Report designer tool enables design/configuration of customized load testing reports.