https://github.com/ClickHouse/ClickHouse

ClickHouse is a free analytics DBMS for big data

https://github.com/cwida/duckdb

DuckDB is an embeddable SQL OLAP Database Management System

https://www.foundationdb.org/ [GitHub]

FoundationDB is a distributed database designed to handle large volumes of structured data across clusters of commodity servers. It organizes data as an ordered key-value store and employs ACID transactions for all operations. It is especially well-suited for read/write workloads but also has excellent performance for write-intensive workloads. Users interact with the database using API language binding.

https://www.mysql.com/

MySQL Database Service is a fully managed database service to deploy cloud-native applications using the world’s most popular open source database. It is 100% developed, managed and supported by the MySQL Team.

https://www.postgresql.org/

PostgreSQL is a powerful, open source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.

https://github.com/rqlite/rqlite

rqlite is a lightweight, distributed relational database, which uses SQLite as its storage engine. Forming a cluster is very straightforward, it gracefully handles leader elections, and tolerates failures of machines, including the leader. rqlite is available for Linux, OSX, and Microsoft Windows.

https://www.sqlite.org/

SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. SQLite is the most used database engine in the world.

https://github.com/pingcap/tidb

TiDB is an open source distributed HTAP database compatible with the MySQL protocol

https://github.com/erikgrinaker/toydb

Distributed SQL database in Rust, written as a learning project.