smithy-lang/smithy

webrpc is a schema-driven approach to writing apis with code generation of full client libraries in many languages

Code generation for the AWS SDK for Rust, as well as server and generic smithy client generation.

Input OpenAPI. Output SDKs and Docs.

Strongly typed HTTP/JSON APIs for browsers and microservices

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.

Apache Thrift