oj by ohler55

Simple, Fast, and Declarative Serialization Library for Ruby. Maintained by procore-oss on GitHub, where it has earned 1,306 stars from the community.

Speedy Rails JSON serialization with built-in caching. Maintained by codenoble on GitHub, where it has earned 161 stars from the community.

Annotate Rails classes with schema and routes info. Maintained by ctran on GitHub, where it has earned 4,491 stars from the community.