Easily convert years to seconds.
Easily convert years to hours.
Easily convert years to days.
Easily convert years to weeks.
Easily convert years to months.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Get all possible details about an SSL certificate.
Get the web-host of a given website.
Take an IP and try to look for the domain/host associated with it.
Make sure your passwords are good enough.