Minify your CSS by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Get the gravatar.com globally recognized avatar for any email.
Get all possible details about a domain name.
Ping a website, server or port..
Make sure your passwords are good enough.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get the size of a text in bytes (B), Kilobytes (KB) or Megabytes (MB).