bn-str-256
Simple, functional big number library for up to 256-bit (32-byte) numbers that outputs decimal strings, with hex, binary, octal, and Buffer decoding/encoding.
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.
archi
Easy math with decimals for Javascript