lowdb
Tiny local JSON database for Node, Electron and the browser
fake-indexeddb
Fake IndexedDB: a pure JS in-memory implementation of the IndexedDB API
rxdb
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
@monode/rxdb-for-ftl
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/