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Discover tools from different categories to expand your toolkit beyond Developer's World.

Free WHOIS lookup tool to check domain registration, expiry dates, nameservers and registrar information for any domain name.

Compare the total cost of renting versus buying a home with opportunity cost and appreciation analysis

Track upcoming astronomical events including meteor showers, eclipses, conjunctions, and other celestial phenomena.

Check if a year is a leap year or find the next leap year with our free calculator. Learn about leap year rules and why we need them.