Numi App - Numi is a beautiful text calculator for Mac.
Voice Calculator - Free calculator with voice input for everyday use!
Calcbot for Apple Watch - Calculate, convert, and split tips from your wrist
RealCalc Scientific Calculator - RealCalc Scientific Calculator
CALCU - CALCU is a simple, yet beautiful and powerful calculator.
HiPER Scientific Calculator - Scientific calculator with up to 100 digits of significand and 9 digits of exponent.