DBMS supporting graph, document, full-text and geospatial models
A JavaScript engine optimized for running React Native
Apache Impala
Easy to use open source fast database for search
Apache IoTDB
Fairly full featured Ansible role for Postgresql
A Python Object-Document-Mapper for working with MongoDB
Entity Relation Diagrams generation tool
Irmin is a distributed database
Couchbase Lite for Dart and Flutter
Fake Protocol Server
Universal abstract-level database for Node.js and browsers
Massively parallel, high performance analytics database
Unix pager (with rich functionality) designed for work with tables
Data mapping and persistence toolkit for Ruby
Simple key-value storage with support for multiple backends
Logical Replication extension for PostgreSQL
Postgres extension and service for automated failover
AgensGraph, a transactional graph database based on PostgreSQL
Open Source NewSQL Database
Turn Clojure data structures into SQL
NoSQL embedded document store for Java
Lightweight and type-safe query builder for DynamoDB and TypeScript
GlueSQL is quite sticky. It attaches to anywhere
Addax is a versatile open-source ETL tool