Certificates are becoming incresingly popular, and if you have a high enough demand running your own certificate server can save a lot of time and money. There are other projects where it would be nice to have a certificate authority, but using a commercial one may be to expensive, in these cases the OpenSource alternatives can be quite good.
A project to provide a comprehensive set of tools for an "out of the box" certificate authority capable of handling X.509 certificates. It is available from: http://www.openca.org/.
pyCA is a collection of software scripts written in python to setup a certificate authority. You can download it from: http://sites.inka.de/ms/python/pyca/.
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