x509 topic
clone-cert
Simple shell script to "clone" X.509 certificates
icingaweb2-module-x509
Keeps track of certificates as they are deployed in a network environment.
x509
Elixir package for working with X.509 certificates, Certificate Signing Requests (CSRs), Certificate Revocation Lists (CRLs) and RSA/ECC key pairs
pkcs11-tools
A set of tools to manage objects on PKCS#11 cryptographic tokens. Compatible with many PKCS#11 library, including major HSM brands, NSS and softoken.
certlint
X.509 certificate linter, written in Go
lokey
A tool that makes it easy to work with and convert between cryptographic key formats
sscg
Simple Signed Certificate Generator
kingsly
Your own x.509 cert manager
FiddlerCert
A Fiddler extension for examining certificates.
awesome-pki
A collection of articles, manuals, research papers, blogs, videos and software somehow related to the Public Key Cryptography (PKI).