Holly Website Audit - Free, brandable website audit for your potential clients
WebsiteSpeedAnalysis.com - Website Speed Analysis Tool
Website Grader - Grade your website's strengths and weaknesses in seconds.
GTmetrix - GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.
Website Speed Ranker - Compare how fast your website loads vs your competitors
PageSpeed Insights - PageSpeed is addon for ...