The management software that runs the certificate authority (CA) at DirectCA.org, or more precisely console.directca.org, is now open source. “vcert” is a web-based application written in Django which relies on OpenSSL for certificate creation and management. DirectCA.org is still free to use, but if you need operate your own CA or a registration authority (RA), then this system provides a simple web-based interface for doing so. This software was originally designed to facilitate testing of the Direct Project.
The source code can be found here on GitHub. See the README for more information on installation and operation.