Take an IP and try to look for the domain/host associated with it.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Get approximate IP details.
Get all possible details about an SSL certificate.
Get all possible details about a domain name.
Check for 301 & 302 redirects of a specific URL. It will check for up to 10 redirects.
Easily remove duplicate lines from a text.
Use the Google translator API to generate text to speech audio.
Make sure your passwords are good enough.
Check if the URL is cached or not by Google.