website technologies, screenshot, common ranks (alexa, pagerank), social share counters (facebook, twitter, google+, pinterest, linkedin, reddit, vkontakte, odnoklassniki)
test website loading performance per request and per connection. Detect problems and provide recomendations
resolve domain DNS records via domain nameservers and root DNS servers, check availability and performance
check SSL certificate, validity, vulnerability, webserver SSL settings, supported SSL/TLS protocols
test website for valid HTML code, display warnings and suggestions in syntax-highlited source
check domain and ips for listing in 300+ DNSBL and domain blacklists. Helps detect mail sending problems
browse prevalence of frameworks, counters, widgets, ads, domain zones, mail, web and dns servers