Datasette : Datasette provides an instant, read-only JSON API for any SQLite database. It also provides tools for packaging the database up as a Docker container ...
Mapstraction : A javascript library to hide differences between mapping APIs.
Pipes : Pipes is a powerful composition tool to aggregate, manipulate, and mashup content from around the web.
htty : htty is a console application for interacting with web servers. It’s a fun way to explore web APIs and to learn the ins and outs of HTTP.
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.