Velero

cert-manager

cert-manager/cert-manager

Popular

Automates issuing and renewing TLS certificates (Let's Encrypt, Vault, private CAs) in Kubernetes.

KEDA

kedacore/keda

Popular

Event-driven autoscaler that scales workloads, including to zero, on queue length, metrics and events.

Karpenter

kubernetes-sigs/karpenter

Trending

Just-in-time node autoscaler that provisions right-sized nodes in seconds; the default choice on EKS.

ExternalDNS

kubernetes-sigs/external-dns

Syncs Kubernetes Services, Ingresses and Gateways to DNS providers like Route 53, Cloudflare and Cloud DNS.

Longhorn

longhorn/longhorn

Distributed block storage for Kubernetes with snapshots, backups and a simple UI; CNCF incubating.

Rook

rook/rook

CNCF-graduated operator that runs Ceph block, file and object storage natively on Kubernetes.

vCluster

loft-sh/vcluster

Rising

Creates virtual Kubernetes clusters inside namespaces for cheap multi-tenancy and ephemeral environments.

Cluster API

kubernetes-sigs/cluster-api

Declarative Kubernetes-style APIs to provision, upgrade and operate clusters across clouds and bare metal.