go.etcd.io/etcd/server/v3

Production-Grade Container Scheduling and Management

Distributed reliable key-value store for the most critical data of a distributed system

Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

TiDB - the open-source, cloud-native, distributed SQL database designed for modern applications.

Lightweight Kubernetes

Dapr is a portable runtime for building distributed applications across cloud and edge, combining event-driven architecture with workflow orchestration.

Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. Its modular and versatile design satisfies a broad range of industry use cases. It offers a unique approach to consensus that enables performance at scale while preserving privacy.

vCluster - Create fully functional virtual Kubernetes clusters - Each vcluster runs inside a namespace of the underlying k8s cluster. It's cheaper than creating separate full-blown clusters and it offers better multi-tenancy and isolation than regular namespaces.