Website Grader - Grade your website's strengths and weaknesses in seconds.
Bugsee - See video, network & logs leading up to bugs or crashes
Textalyzer - Analyze text readability and SEO parameters
Buglife - Seriously awesome bug reporting for iOS apps
Smaller - Make your websites load faster
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.