upscaledb - A very fast lightweight embedded database engine with a built-in query language.

•    C++

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upscaledb is a fast key-value database which optimizes storage and algorithms for your specific data types. upscaledb can be used to build all functions of a typical SQL database, tailored to the specific needs of your application, and directly linked into your program.

nosql database key-value-store key-value embedded-database

immudb - world’s fastest immutable database

•    Go

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immudb is a database with built-in cryptographic proof and verification. It can track changes in sensitive data and the integrity of the history will be protected by the clients, without the need to trust the server. It can operate as a key-value store or as relational database (SQL).

immutable-database immutable database key-value verification immutability pci-dss cryptographic compliance merkle-tree gdpr sensitive-data regulations tamper-evident verifiable-data-structures auditable tamperproof

Coolstorage - ORM library for .NET

•    CSharp

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The main strength of Vici CoolStorage is the ease of use. Most ORM tools still require a lot of unneeded code to accomplish basic data persistence tasks, but Vici CoolStorage is designed to relieve the programmer from these tedious and error-prone tasks, making it very intuitive to use.

orm persistence database-development datamapper ormdotnet

Berkeley DB - Embeddable Databases to Meet Your Needs

•    C

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Oracle Berkeley DB provides the best open source embeddable databases allowing developers the choice of SQL, Key/Value, XML/XQuery or Java Object storage for their data model. At its core is a fast, scalable, transactional database engine with proven reliability and availability. Berkeley DB comes three versions: Berkeley DB, Berkeley DB Java Edition, and Berkeley DB XML.

database embedded-database key-value-store key-value

UnQLite - Transactional Embedded NoSQL Database Engine

•    C

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UnQLite is a in-process software library which implements a self-contained, serverless, zero-configuration, transactional NoSQL database engine. UnQLite is a document store database similar to MongoDB, Redis, CouchDB etc. as well a standard Key/Value store similar to BerkeleyDB, LevelDB, etc.

database embedded-database json-database document-store key-value-store json mobile-database transactional

CockroachDB - Cloud-native SQL database.

•    Go

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CockroachDB is a cloud-native SQL database for building global, scalable cloud services that survive disasters.CockroachDB is a distributed SQL database built on a transactional and strongly-consistent key-value store. It scales horizontally; survives disk, machine, rack, and even datacenter failures with minimal latency disruption and no manual intervention; supports strongly-consistent ACID transactions; and provides a familiar SQL API for structuring, manipulating, and querying data.

database sql distributed-database cockroachdb newsql oltp google-spanner key-value

ArangoDB - The Multi-purpose NoSQL DB

•    C++

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ArangoDB is a multi-purpose open-source database with flexible data model for documents, graphs, and key-values. Build high performance application using a convenient sql-like query language or JavaScript/Ruby extensions. Its key features are Schema-free, Convenient querying using AQL, Extendable through JS, Space efficiency, Supports modern storage hardware, like SSD and large caches and lot more.

database nosql no-sql key-value key-value-store graph-database document-database

CodernityDB - Pure python, NoSQL, Fast Database

•    Python

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CodernityDB is pure python (no 3rd party dependency), fast multi-platform, schema-less, NoSQL database. It has optional support for HTTP server version (CodernityDB-HTTP), and also Python client library (CodernityDB-PyClient) that aims to be 100% compatible with embeded version. It is an advanced key-value database, with multiple key-values indexes in the same engine. It has support for Multiple indexes, Custom storage, Sharding.

database embedded-database key-value-store nosql python-database

HyperGraphDB - Database for Storing Strongly-Typed Hypergraphs

•    Java

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HyperGraphDB is a general purpose, open-source data storage mechanism based on a powerful knowledge management formalism known as directed hypergraphs. While a persistent memory model designed mostly for Knowledge management, Artificial Intelligence and Semantic web projects, it can also be used as an embedded object-oriented database for Java projects of all sizes. It could also be used as graph database or as (non-SQL) relational database.

database graph-database embedded-database no-sql

Skytable - Your next NoSQL database

•    Rust

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Skytable is an effort to provide the best of key/value stores, document stores and columnar databases, that is, simplicity, flexibility and queryability at scale. The name 'Skytable' exemplifies our vision to create a database that has limitless possibilities. It is natively multithreaded and scales to millions of queries per second per node with no optimizations left off the table. The database server doesn't need more than 1MB to run.

sql database nosql dbms distributed-database document-database multi-model column-store beginner-friendly nosql-database database-engine database-server contributions-welcome key-value-store terrabasedb skybase

Perst - object-oriented embedded database

•    Java

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Perst is McObject's open source, dual license, object-oriented embedded database system (ODBMS). Perst gives developers the ability to sort, store and retrieve objects in their applications with maximum speed and with low memory and storage overhead, while leveraging the object-oriented paradigm of Java and C#. It is available in one edition developed as an all-Java embedded database, and another implemented in C# (for Microsoft .NET Framework applications).

database object-database replication embedded persistance

membase - distributed key-value database

•    C

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Membase is an distributed, key-value database management system optimized for storing data behind interactive web applications. These applications must service many concurrent users, creating, storing, retrieving, aggregating, manipulating and presenting data in real-time. Supporting these requirements, membase processes data operations with quasi-deterministic low latency and high sustained throughput.

distributed-caching cache object-cache key-value-database database

Sqlite - SQL database engine

•    C

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SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. It is faster than popular client/server database engines.

database embedded-database embedded sql sql-engine transactional acid

nessDB - A very fast transactional key-value, embedded database storage engine.

•    C

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A very fast transactional key-value, embedded database storage engine.

key-value key-value-store database

PumpkinDB - Event Sourcing Database Engine

•    Rust

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PumpkinDB is a event sourcing database engine that doesn't overwrite data. It features include Immutable key/value storage, ACID transactions, Binary keys and values (allows any encoding to be used: JSON, XML, Protobuf, Cap'n Proto, etc.), An embedded programming language (PumpkinScript), A range of event indexing and querying primitives.

event-sourcing database key-value storage key-value-store concatenative

WowPacketParser - World of Warcraft Packet Parser

•    CSharp

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Optionally, WPP can connect to two kinds of MySQL databases: world from TrinityCore and its own database, WPP. This can be enabled by setting <add key="DBEnabled" value="true" /> in the .config file. Remember to set <add key="TargetedDatabase" value="1"/> in accordance with the targeted version of the core. The world database is used when creating SQL files after parsing to produce the mimimum number of changes needed to update the database. For example, if only the faction of a creature that appears in the sniff needs to be updated, the produced SQL files will contain an UPDATE query, instead of a full INSERT to the table creature_template. WPP does not modify this database directly, all the tentative changes will be written to the output SQL files.

sniff wow parser c-sharp wpp

rosedb - 🚀A fast, stable and embedded k-v database in pure Golang, supports string, list, hash, set, sorted set

•    Go

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rosedb is a fast, stable and embedded key-value (k-v) database based on bitcask. Its on-disk files are organized as LSM trees, optimizing for write throughput. rosedb supports a variety of of data structures such as string, list, hash, set and sorted set. rosedb is written in pure Go. It is production-ready.

redis cli embedded database key-value data-structures throughput ttl kv-store rosedb support-expiration

Bolt - An embedded key/value database for Go.

•    Go

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Bolt is a pure Go key/value store inspired by Howard Chu's LMDB project. The goal of the project is to provide a simple, fast, and reliable database for projects that don't require a full database server such as Postgres or MySQL.

cache key-value key-value-store

LMDB - Lightning Memory-mapped Database

•    C

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LMDB is an extraordinarily fast, memory-efficient database developed for the Symas OpenLDAP Project. With memory-mapped files, it has the read performance of a pure in-memory database while retaining the persistence of standard disk-based databases. With only 32KB of object code, LMDB may seem tiny. But it’s the right 32KB. Compact and efficient are two sides of a coin; that’s part of what makes LMDB so powerful.

database key-value-store memory-mapped embedded-database

YugaByte Database - Transactional, high-performance database for building internet-scale, globally-distributed applications

•    C++

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A cloud-native database for building mission-critical applications. This repository contains the Community Edition of the YugaByte Database.YugaByte offers both SQL and NoSQL in a single, unified db. It is meant to be a system-of-record/authoritative database that applications can rely on for correctness and availability. It allows applications to easily scale up and scale down in the cloud, on-premises or across hybrid environments without creating operational complexity or increasing the risk of outages.

distributed-database database cassandra redis cpp high-performance newsql sql nosql