immutable-js / immutable-js

Immutable persistent data collections for Javascript which increase efficiency and simplicity.

dinerojs / dinero.js

Create, calculate, and format money in JavaScript and TypeScript

unadlib / mutative

Efficient immutable updates, about 3-6x faster than Immer.

clavia-labs / tardigrade

The TypeScript framework for building composable actors around an immutable event log.