An in-memory database that persists on disk
An Embedded NoSQL, Transactional Database Engine
Hypothetical Indexes for PostgreSQL
15MB, lightweight, cross-platform database client
A fast open-source OLAP database management system
High performance NoSQL database based on bitcask
Embeddable, replicated and fault tolerant SQL engine
H2 is an embeddable RDBMS written in Java
Apache IoTDB
Scalable, fast, and disk-friendly vector search in Postgres
Command-line admin tool for observing and troubleshooting Postgres
GridDB is a next-generation open source database
Distributed database ecosphere
Irmin is a distributed database
Server for the MusicBrainz project (website, API, database tools)
A relentless key-value store for the browser
DLE provides blazing-fast database cloning to build dev environments
Relational Database
Chess Database and Toolkit program
Lightweight on-disk hash table for fast key-value storage in pure PHP
Backup and Recovery Manager for PostgreSQL
High-performance, NoSQL engine with transactions for Perl
About MayWeb is a lightweight, beautifully designed local development
Conveniently search and update any volume
Massively parallel, high performance analytics database