Certificate GitHub Repositories (2026) · Open Source Tools

Automatically provision and manage TLS certificates in Kubernetes

Let's Encrypt/ACME client and library written in Go

The Dogtag Certificate System is an enterprise-class Certificate Authority (CA) which supports all aspects of certificate lifecycle management, including key archival, OCSP and smartcard management.

Automated ACME SSL/TLS certificate management built around Azure Key Vault

🧰 A zero trust swiss army knife for working with X509, OAuth, JWT, OATH OTP, etc.

PowerShell module and ACME client to create certificates from Let's Encrypt (or other ACME CA)

A class to validate SSL certificates

An RPKI Validator and RTR server written in Rust

Written by humans. WTX is a collection of different transport implementations and related tools focused primarily on web technologies.

Digital signatures for Laravel, on top of signet-pdf. Sign straight from a Storage disk, keep the private key outside the process, and fake all of it with Process::fake(), Http::fake() and Storage::fake(). A1/x509 certificates, PAdES profiles, RFC 3161 timestamps, LTV and cryptographic validation.

SSL certificate chain resolver

A Kubernetes CSI plugin to automatically mount signed certificates to Pods using ephemeral volumes

istio-csr is an agent that allows for Istio workload and control plane components to be secured using cert-manager.

Keeps track of certificates as they are deployed in a network environment.