Easily convert years to seconds.
Easily convert years to minutes.
Easily convert years to hours.
Easily convert years to weeks.
Easily convert years to months.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Check if the URL is cached or not by Google.
Get approximate IP details.
Take an IP and try to look for the domain/host associated with it.
Get all the HTTP headers that an URL returns for a typical GET request.
Get all possible details about an SSL certificate.