* [orval v8.15.0](https://github.com/orval-labs/orval) – Generates TypeScript clients from OpenAPI v3 or Swagger v2 specifications.

* [SwaggerEditor v5.4.0](https://github.com/swagger-api/swagger-editor) – Edit OpenAPI API definitions in JSON or YAML format and preview documentation in real time.

* [oasdiff v1.16.0](https://github.com/oasdiff/oasdiff) – Command-line and Go package for comparing OpenAPI specs and detecting breaking changes.

* [kin-openapi v0.139.0](https://github.com/getkin/kin-openapi) – OpenAPI v2 and v3 implementation for Go with parsing, conversion, and validation.

* [Counterfact v2.14.0](https://github.com/counterfact/api-simulator) – Generates TypeScript routes from OpenAPI/Swagger specs and runs a stateful, hot-reloading mock API.

* [Redoc v2.5.3](https://github.com/Redocly/redoc) – Tool for generating documentation from OpenAPI definitions with a responsive three-panel layout.

* [nestjs/swagger 11.4.4](https://github.com/nestjs/swagger) – OpenAPI module for the Nest framework.

* [next-openapi-gen v1.4.0](https://github.com/tazo90/next-openapi-gen) – Automatically generates OpenAPI 3.0 documentation from Next.js projects with Zod and TypeScript support.

* [Nestia v11.2.1](https://github.com/samchon/nestia) – Helper libraries for NestJS providing fast decorators, advanced WebSocket routes, SDK generation, mock simulators, and automatic E2E test functions.

* [Swagger UI v5.32.6](https://github.com/swagger-api/swagger-ui) – Tool for visualizing and interacting with APIs based on OpenAPI Specification.

* [OpenAPI v1.23.1](https://github.com/speakeasy-api/openapi) – Go packages and CLI tools for reading, mutating, validating, upgrading, and applying overlays to API specification documents.

* [Fastify OpenApi Glue v4.11.3](https://github.com/seriousme/fastify-openapi-glue) – Plugin for Fastify that autogenerates configuration from OpenAPI specifications.

* [openapi-format v1.32.1](https://github.com/thim81/openapi-format) – Format OpenAPI documents by ordering fields, normalizing casing, filtering elements, splitting/bundling files, and applying overlays.

* [Swagger Client v3.37.4](https://github.com/swagger-api/swagger-js) – JavaScript module for fetching and interacting with Swagger/OpenAPI documents.

* [apigen-ts v1.3.1](https://github.com/vladkens/apigen-ts) – Generate a single-file, fully typed TypeScript fetch client from OpenAPI/Swagger supporting v2, v3, and v3.1.

* [OpenAPI Changes v0.2.7](https://github.com/pb33f/openapi-changes) – Tool that detects and reports changes between OpenAPI and Swagger specifications, offering terminal and HTML reports.

* [Kubb @kubb/plugin-vue-que...](https://github.com/kubb-labs/kubb) – Toolkit for working with APIs.

* [Scalar release-2026-05-14-9...](https://github.com/scalar/scalar) – OpenAPI/Swagger-based interactive API reference and offline-first REST client with testing, code examples, and framework integrations.

* [feTS release-178040939939...](https://github.com/ardatan/feTS) – TypeScript HTTP framework focused on end-to-end type safety, easy setup, high performance, and strong developer experience.