This plugin enables SingleSignOn (SSO) between your forum and other authorized consumers on the same domain, via cookie sharing.
Allows users to create accounts and sign into Vanilla through external applications. Currently has a WordPress plugin in the package for seamless WordPress integration.
Check out this page for instructions on how to use Single Sign On with your existing applications. http://vanillaforums.org/page/singlesignon
This addon is a plugin. You need to extract it to your /plugins folder to install it.