Minify your HTML by removing all the unnecessary characters.
Minify your CSS by removing all the unnecessary characters.
Get the gravatar.com globally recognized avatar for any email.
Make sure your passwords are good enough.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.
Crop images to a specific size.
Get approximate IP details.