Qtmetrix.com is a detailed tool for measuring your site performance online (Digital Inspiration)
Quickly create complex and innovative data-driven Apps (Qlik Playground)
By accessing public data sets (including your own GitHub or Spotify data) through Qlik Associative Engine and APIs, you can experiment and create beautiful visualizations and data-driven apps using powerful search, data retrieval without writing queries, out-of-the-box charts with a single line of code and more. Free. Qlik Playground
Lead the charge to use data in every stage of your design process (Marketing Land)
Understand content interaction and geographic distribution using video analytics (Kaltura)
Kaltura‘s built-in analytics and reports provide the insight you need to successfully manage content and make decisions based on real data.
Direct Traffic is Dark Traffic, and That’s OK (Seer Interactive)
Website value calculator (WebsiteOutlook)
Proposes a valuation based on more then 20 metrics to measure and track success of a website: http://www.websiteoutlook.com/
How To Justify User Research Sample Size And Data (Smashing Magazine)
Useful formula to determine an exact sample size for qualitative research: https://www.smashingmagazine.com/2017/03/user-research-sample-size-data/