Easily convert days to seconds.
Easily convert days to minutes.
Easily convert days to hours.
Easily convert days to weeks.
Easily convert days to months.
Get the gravatar.com globally recognized avatar for any email.
Make sure your passwords are good enough.
Check if the URL is banned and marked as safe/unsafe by Google.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get details of any file type, such as the mime type or last edit date.
Take an IP and try to look for the domain/host associated with it.