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

Check DNS records (A, MX, CNAME, etc.) with our free DNS lookup tool. Fast and reliable DNS record checker for domain diagnostics.

Calculate the length of daylight, night, and twilight periods for any location and date. Track seasonal changes in day/night duration.

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.

Calculate how much house you can afford using the 28/36 rule and DTI ratios