Calca is a development software and application designed to make coding and programming simpler and easier. It helps developers and programmers create programs and operate complex data sets quickly and efficiently. Calca helps users save time by allowing them to write code, algorithms, and equations in plain English, meaning developers don’t have to waste time typing out long lines of code. This software offers powerful features such as a live preview of code, the ability to share code with others, a built-in library of functions and equations, and the ability to easily export code to other languages. Calca is available for both Mac and Windows operating systems.
Mathematica
Qalculate!
Soulver
Numi
It has a similar "natural" description for calculations. Spreadsheet-like functions, instant answers, variables, conversions, etc. Everything is here. As a (powerful) subset of Calca.