Easily convert days to seconds.
Easily convert days to minutes.
Easily convert days to weeks.
Easily convert days to months.
Take an IP and try to look for the domain/host associated with it.
Get approximate IP details.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Make sure your passwords are good enough.
Get the gravatar.com globally recognized avatar for any email.
Get all possible details about a domain name.