WeSQL is a cloud-native architected MySQL that uses S3 (and S3-compatible systems) for storage, providing cross-AZ disaster recovery with zero data loss, at nearly the cost of a single replica. 

DocumentDB offers a native implementation of document-oriented NoSQL database, enabling seamless CRUD operations on BSON data types within a PostgreSQL framework. Powering vCore-based Azure Cosmos DB for MongoDB.

Simple UI that provides SQL support for VictoriaLogs and VictoriaTraces

AliSQL is Alibaba's MySQL branch, forked from the official MySQL and used extensively in Alibaba Group's production environment. It includes various performance optimizations, stability improvements, and features tailored for large-scale applications

Multi-Model Database, one DBMS that supports SQL, Cypher, Gremlin, HTTP/JSON, MongoDB and Redis. ArcadeDB is a conceptual fork of OrientDB, the first Multi-Model DBMS. ArcadeDB supports Vector Embeddings.

PgDog is a proxy for scaling PostgreSQL. It supports connection pooling, load balancing queries and sharding entire databases. Written in Rust, PgDog is fast, secure and can manage thousands of connections on commodity hardware.