* [Lego v5.5.0](https://github.com/go-acme/lego) – Let's Encrypt client and ACME library written in Go.

* [istio-csr v0.18.0](https://github.com/cert-manager/istio-csr) – Enables Istio workloads and control plane components to obtain and renew mTLS certificates via cert-manager.

* [cert-manager v1.20.4](https://github.com/cert-manager/cert-manager) – Tool for managing and automating TLS certificates in Kubernetes clusters.

* [Certs Maker v3.8.1](https://github.com/soulteary/certs-maker) – Lightweight self-signed certificate generator that creates PEM or DER certificates from simple configuration for self-hosted and development use.

* [Certstream Server Go v1.10.1](https://github.com/d-Rickyy-b/certstream-server-go) – Go-based drop-in replacement for a certificate-streaming server that aggregates, parses, and streams certificate transparency log entries via WebSockets.

* [Kubelet Serving Certificate Approver v0.12.1](https://github.com/alex1989hu/kubelet-serving-cert-approver) – Custom approving controller that approves kubernetes.io/kubelet-serving Certificate Signing Requests for kubelet TLS endpoints.