middleclass

Provides a clean, intuitive interface for class creation and inheritance, as demonstrated in the quick look example with simple 'class' calls and method definitions, reducing boilerplate code.

Enables overloading Lua operators and other metamethods within classes, a feature highlighted in the key features that allows for expressive object behavior not common in other Lua OOP libraries.

Includes weak mixin support for reusing code across unrelated classes, facilitating modular design without deep inheritance chains, as noted in the key features.

Comes with performance tests and is designed to be lightweight, ensuring minimal overhead in resource-constrained environments like game development, as mentioned in the performance section.

Offers a detailed wiki with examples and documentation, plus changelogs and update guides, making it easy to learn and maintain, as referenced in the README.