SlimerJS is described as 'Scriptable browser. It allows you to manipulate a web page with a Javascript script: opening a webpage, clicking on links, modifying the content... It is useful to do functional tests, page automaton, network monitoring, screen capture etc' and is a automated testing tool in the web browsers category. There are more than 10 alternatives to SlimerJS for a variety of platforms, including Windows, Linux, Web-based, Mac and SaaS apps. The best SlimerJS alternative is Selenium, which is both free and Open Source. Other great apps like SlimerJS are Cypress, PhantomBuster, CasperJS and Uier.