Uconeer

From Katmar Software:

Has 370 units in 42 categories. Covers all the basic categories but adds engineering specific categories like enthalpy, entropy, heat capacity, heat transfer coefficient, moment of inertia, stress, surface tension, thermal conductivity, torque and viscosity. Converts feet, inches and fractions to and from decimal lengths. Converts between dynamic and kinematic viscosity. Gas Constant in 800 sets of units. Interface is kept simple by exclusion of all archaic and esoteric units. Powerful formatting and clipboard features.