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Discover tools from different categories to expand your toolkit beyond Developer's World.
Business Days Calculator
Calculate business days between dates excluding weekends and holidays. Add or subtract working days from a date with our free business days calculator.
Datetime
CRAFFT Screening Test
Use the CRAFFT screening tool to assess substance abuse risk in adolescents and young adults. Validated screening questionnaire for healthcare providers.
Health
Coordinate Geometry Calculator
Calculate distance, midpoint, slope, and line equations from coordinates
Math
Blacklist Checker
Check if an IP address is listed on any spam or security blacklists with our free online blacklist checker tool. Verify your email server's reputation.
Network