* [nestjs/swagger 12.0.0](https://github.com/nestjs/swagger) – OpenAPI module for the Nest framework.

* [orval v8.26.0](https://github.com/orval-labs/orval) – Generates TypeScript clients from OpenAPI v3 or Swagger v2 specifications.

* [Nestia v13.0.0](https://github.com/samchon/nestia) – Helper libraries for NestJS providing fast decorators, advanced WebSocket routes, SDK generation, mock simulators, and automatic E2E test functions.

* [ApiMesh v2.0.0](https://github.com/qodex-ai/apimesh) – Code-to-OpenAPI generator that scans a repository, detects the web framework, and produces an OpenAPI 3.0 spec plus a self-contained HTML API catalog.

* [Swagger UI v5.32.14](https://github.com/swagger-api/swagger-ui) – Tool for visualizing and interacting with APIs based on OpenAPI Specification.

* [next-swagger-doc v0.5.0](https://github.com/jellydn/next-swagger-doc) – Generates an OpenAPI (Swagger) JSON specification from JSDoc-annotated Next.js API routes and supports rendering Swagger UI.

* [Spectrum v1.21.0](https://github.com/grokify/spectrum) – OpenAPI 3 and 2 SDK providing enhanced conversion to Postman collections, plus editing, merging, splitting, and linting tools.

* [Spot v2.1.0](https://github.com/airtasker/spot) – Concise TypeScript-based syntax for describing API contracts and generating OpenAPI, Swagger, and JSON Schema.

* [OpenAPI v1.25.0](https://github.com/speakeasy-api/openapi) – Go packages and CLI tools for reading, mutating, validating, upgrading, and applying overlays to API specification documents.

* [SwaggerEditor v5.8.5](https://github.com/swagger-api/swagger-editor) – Edit OpenAPI API definitions in JSON or YAML format and preview documentation in real time.

* [next-openapi-gen v1.8.0](https://github.com/tazo90/next-openapi-gen) – Automatically generates OpenAPI 3.0 documentation from Next.js projects with Zod and TypeScript support.

* [Kubb kubb@5.0.0](https://github.com/kubb-labs/kubb) – Toolkit for working with APIs.

* [OpenAPI Changes v0.2.11](https://github.com/pb33f/openapi-changes) – Tool that detects and reports changes between OpenAPI and Swagger specifications, offering terminal and HTML reports.

* [openapi-backend 5.20.1](https://github.com/openapistack/openapi-backend) – Framework-agnostic middleware tool for building APIs using OpenAPI definitions.

* [apigen-ts v1.4.0](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 to CLI (ocli) v0.1.19](https://github.com/EvilFreelancer/openapi-to-cli) – Turns any OpenAPI/Swagger-described HTTP API into runtime CLI commands, exposing one subcommand per endpoint.

* [oasdiff v1.29.1](https://github.com/oasdiff/oasdiff) – Command-line and Go package for comparing OpenAPI specs and detecting breaking changes.

* [Scalar release-2026-08-20-1...](https://github.com/scalar/scalar) – OpenAPI/Swagger-based interactive API reference and offline-first REST client with testing, code examples, and framework integrations.