Easily convert weeks to seconds.
Easily convert weeks to minutes.
Easily convert weeks to hours.
Easily convert weeks to days.
Easily convert weeks to months.
Get the gravatar.com globally recognized avatar for any email.
Check if the URL is cached or not by Google.
Take an IP and try to look for the domain/host associated with it.
Get all possible details about an SSL certificate.
Get & verify the meta tags of any website.
Make sure your passwords are good enough.