An in-memory database that persists on disk
Hypothetical Indexes for PostgreSQL
An Embedded NoSQL, Transactional Database Engine
High performance NoSQL database based on bitcask
Command-line admin tool for observing and troubleshooting Postgres
H2 is an embeddable RDBMS written in Java
Embeddable, replicated and fault tolerant SQL engine
Apache IoTDB
Scalable, fast, and disk-friendly vector search in Postgres
Irmin is a distributed database
GridDB is a next-generation open source database
DLE provides blazing-fast database cloning to build dev environments
A relentless key-value store for the browser
Distributed database ecosphere
Relational Database
A tiny KV storage based on skiplist written in C++ language
High performance datastore for time series and tick data
DataFrame server for financial timeseries data
A basic REST service for JSON data - enough for prototyping and MVPs
Columnar storage extension for Postgres
An Internet-scale database
An in-memory database based on the CouchDB REST API
In-memory NoSQL database with ACID transactions, Raft consensus, etc.
A server and database monitoring platform.
Big Sack: A lightweight Java Key/Value store with undo and disk cache.