* [Ruby::Enum v1.2.0](https://github.com/dblock/ruby-enum) – A Ruby mixin that defines enum-like constant and class-method access with Enumerable support, hashing helpers, and duplicate-value checks.

* [enum-plus v3.3.0](https://github.com/shijistar/enum-plus) – Enhanced enum library compatible with native enum, featuring display text, localization, and UI control binding.