- Performance Test
- Load Test
- Stress Test
- Capacity Test
- LoadUI - Free open source load testing tool.
- SoapUI - you can record the FireFox browser user activities and replay them later :) - refer to this article.
- Stress tools from Microsoft here
- Web Capacity Analysis Tool (WCAT) - this tool is mainly used for performance testing.
- Web Load: open source load testing tool
- JMeter: a free performance test tool
- Process Explorer
- RedGate ANTS Memory Profiler