Minify your CSS by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Make sure your passwords are good enough.
Get the gravatar.com globally recognized avatar for any email.
Get approximate IP details.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Easily remove duplicate lines from a text.
Check if the URL is banned and marked as safe/unsafe by Google.