Get all possible details about an SSL certificate.
Get all the HTTP headers that an URL returns for a typical GET request.
Check whether a website is using the new HTTP/2 protocol or not.
Take an IP and try to look for the domain/host associated with it.
Make sure your passwords are good enough.
Generate passwords with custom length and custom settings.
Ping a website, server or port.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.