Macro(s) for vectorizing loops
PerfView is a CPU and memory performance-analysis tool
Clinic.js diagnoses your Node.js performance issues
Scriptable database and system performance benchmark
Command Line profiler of CPU usage
An online request replication tool, also a tcp stream replay tool
Enterprise level performance test platform on The Grinder
Library tools to collect timing in Java, C, C++
SarBox helps user to parse or analyze sar data
A Portable Thin Client & Server Pair for XA / 2PC Testing
Java5 distributed JUnit with mobile agents.