Mapstraction : A javascript library to hide differences between mapping APIs.
httpbin.org : A simple HTTP Request & Response Service.
Freebase : A community-curated database of well-known people, places, and things
JSON Schema : JSON Schema is a vocabulary that allows you to annotate and validate JSON documents.
Gluon API : A clear, concise, simple yet powerful and efficient API for deep learning.
Bluepine is a DSL for defining API Schema/Endpoint with the capabilities to generate Open API (v3) spec, validate API request and serialize object for API response based on single schema definition.