UCSystem — A professional web-based unit conversion system covering 16 categories: Length, Weight, Volume (Liquid & Dry), Temperature (°F °C K °R simultaneously), Area, Speed, Time, Digital Storage, Energy, Power, Pressure, Frequency, Angle, Fuel Economy, and Cooking. Supports US Standard, Metric, and US↔Metric modes with real-time bidirectional conversion., SRM-Chem — A professional web-based chemical concentration calculator supporting 9 calculation modes (Dilution, % V/V, % W/W, % W/