Run and access GTmetrix tests to measure website performance (unofficial)
Rules related to checking the compatability of the CSS on the page ensuring the stylesheet works on older browsers too
Commnad line version of YSlow web performance analysis tool from HAR files
yslow-nodejs is forked from yslow's (https://github.com/marcelduran/yslow) nodejs component and fixed its jsdom version to 3.1.2 and upgraded yslow to version 3.1.8