HyperLogLog with lots of sugar (Sparse, LogLog-Beta bias correction and TailCut space reduction) brought to you by Axiom

A sandbox created from scratch in C

Sphinx is a state-of-the-art succinct and dynamic perfect hash table engineered for high performance on modern x86 CPUs.

Core engine for the Brave browser for mobile and desktop. For issues https://github.com/brave/brave-browser/issues

Murmur3 hash in C

This is RonDB, a distribution of NDB Cluster developed and used by Hopsworks AB. It also contains development branches of RonDB.

JSON for Modern C++

Vitess for Postgres

H-Store Distributed Main Memory OLTP Database System

Pure Go SQL parser

A minimalist LSM (Log-Structured Merge Tree) storage engine

Real-time event streaming platform. Streaming CDC, stream processing, low-latency serving, and Iceberg management.

Venice, Derived Data Platform for Planet-Scale Workloads.

Distributed object store

A high-availability, high-throughput and highly reliable distributed queue based on the Paxos algorithm.

ToplingDB is a cloud native LSM Key-Value Store with searchable compression algo and distributed compaction

Specifications related to MongoDB

Stackless Async Subroutines for C

Cross-platform asynchronous I/O

The Official Golang driver for MongoDB

Required C library for Client Side and Queryable Encryption in MongoDB

C++ Driver for MongoDB

The Official MongoDB driver for C language

General purpose storage service

A data structure and algorithm library built for TerarkDB

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

libSQL is a fork of SQLite that is both Open Source, and Open Contributions.

Golang driver for ClickHouse

Disk Based Key-Value Store Inspired by Bitcask