Ruvenss Calculator - Simple yet very effective calculator with print capabilities and log registration.
Numi App - Numi is a beautiful text calculator for Mac.
PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...
Calcbot for Apple Watch - Calculate, convert, and split tips from your wrist
OpalCalc - OpalCalc is a brand new type of calculator for the PC.
CALCU - CALCU is a simple, yet beautiful and powerful calculator.