CFSSL is CloudFlare's PKI/TLS swiss army knife. It is both a command line tool and an HTTP API server for signing, verifying, and bundling TLS certificates. It requires Go 1.16+ to build.

EJBCA covers all your needs – from certificate management, registration and enrollment to certificate validation.

Welcome to EJBCA – the Open Source Certificate Authority. EJBCA is one of the longest running CA software projects, providing time-proven robustness and reliability. EJBCA is platform independent, and can easily be scaled out to match the needs of your PKI requirements, whether you’re setting up a national eID, securing your industrial IoT platform or managing your own internal PKI.