CakePHP DTO plugin - quickly generate useful data transfer objects for your app (mutable/immutable)

MIT License

cakephp-dto

True Object-Oriented Java Web Framework without NULLs, Static Methods, Annotations, and Mutable Objects

takes

A mutable set that remembers the order of its entries. One of Python's missing data types.

ordered-set

An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming. ReactiveUI allows you to  abstract mutable state away from your user interfaces, express the idea around a feature in one readable place and improve the testability of your application.

ReactiveUI

Lightweight analysis tool for detecting mutability in Java classes

Apache License 2.0

MutabilityDetector

proteus

Bindings and implementation for mutable JavaScript ArrayBuffers.

purescript-arraybuffer

container-factory produces Docker images from tarballs of application source code

ISC License

container-factory

High-performance immutable data structures for modern JavaScript and TypeScript applications. Functional interfaces, deep/composite operations API, mixed mutability API, TypeScript definitions, ES2015 module exports.