PerfView is a CPU and memory performance-analysis tool
Macro(s) for vectorizing loops
Clinic.js diagnoses your Node.js performance issues
Scriptable database and system performance benchmark
An online request replication tool, also a tcp stream replay tool
Slows down any given Windows process (written in C#)
A benchmark to test your CPU, RAM, and system
Java based CPU stress testing tool
Library tools to collect timing in Java, C, C++
SarBox helps user to parse or analyze sar data