Decode URL input to back to a normal string.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Ping a website, server or port..
Take an IP and try to look for the domain/host associated with it.
Make sure your passwords are good enough.
Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.
Convert a unix timestamp to UTC and your local date.