Session Alive Firefox add-on provides an important feature for testers as well as developers; keep the session alive for any website, even the user is inactive for long period of time.
IronWASP is an open source system for web application vulnerability testing. It can be customized to create custom security scanners using Python or Ruby scripting. This system is simple enough to be used by absolute beginners.
Eclipse is an integrated development environment (IDE) and famous for Java IDE. Python language is supported by Selenium and can be utilized for testing of web applications.
iMacros is available as a free extension for the Mozilla Firefox, Google Chrome, and Internet Explorer web browsers. iMacros can record and replay repetitious work, which is great for regression testing and integration testing.