Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
SEOBOTS.io - Easy to use bots for data mining and growth hacking: parsers, crawlers and much more.
Uier - Codeless or low-code User Experience test editing and management using Selenium to perform testing...
Wicked PDF - PDF generator (from HTML) plugin for Ruby on Rails
Webinject - WebInject is a free tool for automated testing of web applications and web services.
TexAu - Growth automation to scale your business faster