https://blog.octo.com/scylladb-vs-cassandra-towards-a-new-myth
AlloyDB is a distributed SQL database.
Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/
A pure Rust database implementation using an append-only B-Tree file format.
Distributed SQL database in Rust, written as an educational project