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.
Ping a website, server or port..
Convert gallons (imperial) to liters with ease.
Extract email addresses from any kind of text content.
Convert your color to multiple other formats.
Check if the URL is cached or not by Google.