Java Certificate Viewer
A java certificate viewer (written by Van Bui) is
included as part of JXplorer. This can actually be
run stand alone using the com.ca.commons.security.cert.CertViewer class. It can be used to view X509 certificates
in either PEM or DER format, and in addition can
write to either of these formats
Making a stand alone package for this is still on the to-do list though :-). Keen developers should be able to extract it from the source tree without too much trouble though.