| Capacitas | | Performance and capacity planning consultancy and training services. Includes whitepapers. Head office located in London, UK. |
| Capacity Planning | | White paper on the role of capacity planning in e-commerce, how to approach it, and how to maintain it. |
| CIMS Lab, Inc. | | Software and services for resource accounting, capacity planning, and IT chargeback. |
| Jonathan Hardwick | | Product information about Microsoft's System Center Capacity Planner. |
| PerfCap Corporation | | PerfCap Corporation provides Performance Management and Capacity Planning Products and Services. |
| PerfCap UK | | Offers web-based cross-platform performance analysis and capacity planning tool. Also provides consulting services. |
| Performance Dynamics Company | | Develops performance tools, evaluates performance-related products, designs system benchmarks, and troubleshoots performance problems. Contact information, events calendar, and links to software tools. |
| Red Hill Networks' WebSpray | | This tool allows you to stress test your web server through a LAN or modem connection. It will generate reports for errors and performance. |
| RRD TOOL | | A useful open source tool for storage and retrieval of time series data. |
| Schema | | Schema is a provider of telecom resource management (TRM) solutions that enable operators of wireless networks worldwide to optimize and manage their resources. |
| Transaction Design Inc. | | Consultant and tools vendor with focus on system monitoring, capacity planning, and benchmarking. Tools work on HP/Compaq/Tandem NonStop Kernel, Stratus VOS, and UNIX. Site includes articles on management/performance topics for these OSs. | |
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