AliSQL is a MySQL branch originated from Alibaba Group. Fetch document from Release Notes at bottom.

TiKV is an open-source, distributed, and transactional key-value database

polardbx-engine is a MySQL branch originated from Alibaba Group, especially supports large-scale distributed database system.

TBase is an advanced enterprise-level database management system based on prior work of Postgres-XL project.

Cetus是由C语言开发的关系型数据库MySQL的中间件，主要提供了一个全面的数据库访问代理功能。Cetus连接方式与MySQL基本兼容，应用程序几乎不用修改即可通过Cetus访问数据库，实现了数据库层的水平扩展和高可用。