OpenDemand's OpenLoad Web App Load Testing Tool

The viewlet for this tool is not yet available, but in the meantime let us point out that this hosted web load testing tool is available free on a trial basis (with no time limit) for up to 5 virtual users.

The tool is pretty self-explanatory, being a very easy to use record and playback tool for testing your web apps.

Even if you think that you don't need to worry about load testing, or if you think 5 users is too few to really stress you rsyste, you might be surprised. Try it out!