
DebugBear
GTmetrix
SpeedCurve
PageSpeed Insights
WebPagetest
Pingdom
Request Metrics
Proxyman.io
Facebook Design
Design Principles
Facebook Design Resources
Atlassian Design
Facebook
Designer Mill
Colorbox.io
Freebiesbug
Monitor the performance of your website and benchmark against the competition. Get alerted in Slack or by email when there's a problem.
Continuously test the speed of your website in a controlled lab environment and get in-depth reports to optimize your site. DebugBear is built on top of Lighthouse, but provides debug data that goes far beyond the basic Lighthouse report.
In addition to the lab data, DebugBear also keeps track of the real-user data collected by Google.
DebugBear
Facebook DesignGTmetrix - 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.
Design Principles - An open source repository of design principles and methods
SpeedCurve - Monitor your front-end. Beat the competition
Facebook Design Resources - A collection of free resources made by designers at Facebook
PageSpeed Insights - PageSpeed is addon for ...
Atlassian Design - Design, develop, and deliver