(2022-08-21T21:00:00.000Z) Protocol Buffers is a Google-developed toolchain for binary encoding of data and objects that works between programming languages. It is the basis of gRPC, a cross-language remote procedure call system, but can be used separately.
(2021-04-14T21:00:00.000Z) ForerunnerDB is a JavaScript library for storing data using a MongoDB-like API. It runs in both the browser and server-side in Node.js, and requires no setup of any server making it convenient for inline database functionality. It supports persisting data either to browser local storage, or the Node.js supports persisting data to a directory containing JSON objects.