Website Speed

Pagespeed Insights Measure your Pagespeed with Googles Tool
Pingdom Measure Loading Time Timings, Volume, Number of Requests and more
GTMetrix You can Measure and Compare Websites with Pagespeed, Yslow, Waterfall and more
Webpagetest Measure Pagespeed from different Locations all over the World
Varvy Requests See the number of Scripts and CSS Files that are being loaded on Pageload Another alternative Page Speed Service