4. WebargsA friendly library for parsing HTTP request arguments, with built-in support for popular web frameworks, including Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp.
5. ApispecA pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..
7. MarshmallowA lightweight library for converting complex objects to and from simple Python datatypes.
9. Flask SmorestDB agnostic framework to build auto-documented REST APIs with Flask and marshmallow