Apache JMeter

Apache JMeter is an open-source performance testing tool used for load testing, stress testing, and measuring the performance of web applications and services.

It supports testing for a wide variety of protocols such as HTTP, HTTPS, SOAP, FTP, and databases via JDBC. JMeter allows users to simulate heavy loads on a server, group of servers, network, or object to evaluate its strength and analyze overall performance under different conditions.

Its flexible, extensible design, along with a user-friendly interface and integration with CI/CD pipelines, makes it popular for performance and functional testing across various platforms.