Generate an MD4 hash for any string input.
Generate an MD5 hash of 32 characters length for any string input.
Get the gravatar.com globally recognized avatar for any email.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Make sure your passwords are good enough.
Check if the URL is cached or not by Google.
Get details of any file type, such as the mime type or last edit date.
Get the web-host of a given website.