exactnumber
Arbitrary-precision decimals. Enables making math calculations with rational numbers, without precision loss.
toprecision
[toPrecision](https://www.npmjs.com/package/toprecision) is a npm module similar to built-in [.toPrecision()](https://www.w3schools.com/jsref/jsref_toprecision.asp), but without exponential notation.
bignumber-utils
The bignumber-utils package empowers developers to effortlessly perform accurate and reliable decimal and non-decimal arithmetic in JavaScript, leveraging the robust foundation of the bignumber.js library.
bignumber.io
Library for representing decimal numbers and large integers of arbitrary-precision and using basic and complex mathematical methods, conversions between bases and logical operations with good handling of descriptive errors.