For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

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

A generic dynamo implementation for different k-v storage engines

An ultra-lightweight database that supports key-value and time series data | 一款支持 KV 数据和时序数据的超轻量级数据库

An Embedded NoSQL, Transactional Database Engine

Lightweight IoT device information storage solution: KV/IAP/LOG. | 轻量级物联网设备信息存储方案：参数存储、在线升级及日志存储 ，全新一代版本请移步至 https://github.com/armink/FlashDB

A high performance HTTP proxy cache server and RESTful NoSQL cache server based on HAProxy

🏂 EJDB2 — Embeddable JSON Database engine C library. Simple XPath like query language (JQL).

★ Fullfast transactional key-value memory-mapped B-Tree storage engine without WAL ★ Surpasses the legendary LMDB in terms of reliability, features and performance. ★ Used by half of Ethereum and many other cryptocurrencies

cachegrand - a modern data ingestion, processing and serving platform built for today's hardware

A very fast transactional key-value, embedded database storage engine in Fractal-Tree. Teaching/Research purposes only.

HSE: Heterogeneous-memory storage engine

libshmcache is a local cache in the share memory for multi processes. high performance due to read is lockless. libshmcache is 100+ times faster than a remote interface such as redis.

Multipurpose C library and persistent key/value storage

C library of key-value data structures.

Simple and fast string based key-value database with support for arrays and json

B-tree generator for C

Bun is a simple to use C++ Object Database, Object Relational Mapper (ORM) and key-value library

Embeddable Cloud-Native Key-Value Storage For Sequential Data.

A dictionary data type with a fast b-tree based search