Prototype Bud runtime (Bloom Under Development)

Diesel async connection implementation

A graph-relational database with declarative schema, built-in migration system, and a next-generation query language

A wiki using HAppS, pandoc, and git

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

Fuse tag file system

Riak is a decentralized datastore from Basho Technologies.

Metakit is an efficient embedded database library with a small footprint

Official repository of the SOCI - The C++ Database Access Library

BON - Binary Object Notation

Npgsql is the .NET data provider for PostgreSQL.

Temporal extensions for PostgreSQL

A library that provides an embeddable, persistent key-value store for fast storage.

Mirror of the Xapian repository. You're welcome to open pull requests on github (they'll just get merged indirectly).

An open-source graph database

PostgreSQL protocol gateway for Presto distributed SQL query engine

Irmin is a distributed database that follows the same design principles as Git

JsQuery – json query language with GIN indexing support

REST API for any Postgres database

A Polyglot Database Client for Mac OS X

A Polyglot Database Client for Mac OS X

TypeDB: the power of programming, in your database

NoSQL data store using the seastar framework, compatible with Apache Cassandra

A high performance, shared memory, lock free, cross platform, single file, no dependencies, C++11 key-value store

Time-series database

the champagne of beta embedded databases

FoundationDB - the open source, distributed, transactional key-value store

A flexible distributed key-value datastore that is optimized for caching and other realtime workloads.

This is a mirror of Picodata, an in-memory database with plugins in Rust.

Limbo is a work-in-progress, in-process OLTP database management system, compatible with SQLite.