SSL: Secure Socket Layer
Apache-SSL
Netscape
Certificate Specifications
Introducing SSL and Certificates using SSLeay
Netscape:
Introduction to SSL
Mod_ssl
Net::SSLeay.pm Home Page
OpenSSL
Valicert's
PKI (Public Key Infrastructure) Links
Includes a Certificate Authorities list
Java
Secure Socket Extension (JSSE)
SSLeay and SSLapps FAQ
List of Certification Authorities
SSLeay Certificate Cookbook
SSLwrap
Stronghold