Simple to use local JSON database. Use native JavaScript API to query. Written in TypeScript. (supports Node, Electron and the browser)

A fast, offline-first, reactive Database for JavaScript Applications https://rxdb.info/

DuckDB is an in-process SQL OLAP Database Management System

libSQL is a fork of SQLite that is both Open Source, and Open Contributions.

A transactional, relational-graph-vector database that uses Datalog for query. The hippocampus for AI!

An educational OLAP database system.

Document-oriented, embedded SQL database

Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.

A simple, fast and versatile Datalog database

Java embedded nosql document store

Lightning Memory Database (LMDB) for Java: a low latency, transactional, sorted, embedded, key-value store

PoloDB is an embedded document database.

Embeddable property graph database management system built for query speed and scalability. Implements Cypher.

chDB is an embedded OLAP SQL Engine powered by ClickHouse

A fast, log structured key-value store.

A lightweight document-oriented NoSQL database written in pure Golang.

Python bindings for the UnQLite embedded NoSQL database

A library for creating isolated embedded databases for Spring-powered integration tests.

Multiplatform NoSQL database

Authenticated multi-version database: sparse binary merkle tree with compact partial-tree proofs