Tools to watch how your users use your product
Custodee lets you monitor your competitors changes to their website content and sends you a summarised email once a day if there are any changes. It also does daily screenshots which will be stored and can be exported, so you can visually compare the screenshots side by side and review your competitors updates. Great for eCommerce business, start an AdWords campaigns when competitor products are out of stock. Track competitor products and get alerts when prices change so you can make special offers and attract new customers.
GTmetrix's Report Page neatly summarises your website performance based off key indicators of page load speed. GTmetrix provides various optimising suggestions that can greatly improve your overall website speed score. It also lets you see your page's performance relative to the average of all sites analysed on GTmetrix. Just enter your website url and seconds later your results will appear.
Nibbler is a free tool for testing websites. Enter the address of any website and Nibbler will give you a report scoring the website out of 10 for key areas, including accessibility, SEO, social media and technology. Nibbler is completely free, but limited to three reports.