getkin / kin-openapi

OpenAPI 3.0 and 3.1 and 3.2 (and Swagger v2) implementation for Go (parsing, converting, validation, and more)

stoplightio / prism

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

OpenAPITools / openapi-generator-cli

A node package wrapper for https://github.com/OpenAPITools/openapi-generator

marshmallow-code / apispec

A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..