Impressive & Free Load Testing Tool – loadUI
loadUI is an open source, cross-platform and free load testing tool that supports all the standard protocols-technologies.
With a slick, drag 'n' drop interface, it allows us to create new tests and fine tune every detail very easily.
The tool consists of various components that play with each other very well like statistics, scheduler or analytics components.
loadUI can send multiple requests from a single machine or the requests can be distributed across any number of remote machines by installing agent apps to them for a real-world simulation.
Multiple tests can be ran at the same time, the details of each test can be viewed live and it is possible to compare them with previously-ran tests.
Also, it has a powerful reporting engine that can auto-generate detailed and easy-to-understand reports with only few clicks.