Webinject is a testing tool for web applications and web services. It is a scripting language that enables users to create powerful scripts to validate functionality and performance of web-based applications. The scripts can be used to simulate a large number of simultaneous users, enabling users to test the scalability of their applications. Webinject also allows users to test for the presence of vulnerabilities, such as cross-site scripting, SQL injection, and buffer overflows. It can also be used to test for the presence of secure connections, such as SSL/TLS, and verify the secure connection is using the latest protocol. Finally, Webinject can also be used to monitor web application performance, including response times and throughput.
Selenium
CasperJS
Phantomjs
SlimerJS
UniBot
UBot Studio
iMacros
httest
Screenster
PhearJS
DalekJS
I own ipswitch iMacro Professional and, after careful consideration, I think UBot Studio might be a better choice since iMacro is very limited to only a few experts.