The Apache JMeter™ application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.

Automated robustness testing at the UI level

Disable images on current site. Use this extension to disable/enable images on the current site.

An open-source, automated tool to help you improve the quality of web pages. You can run it on any web page, public or requiring authentication.

Visualise tab order with ease - taba11y calculates the tab order of all elements and displays it visually, either by drawing a path or by highlighting the elements.

A website for getting different information for colors (different formats, complementary color) , especial a color blindness simulator.