Crowd is a Web-based single sign-on (SSO) tool that simplifies application provisioning and identity management. It has connectors for popular open source projects like Apache (via Perl) and Subversion. Pre-built connectors for other popular commercial products like Jive Forums, JIRA, and Confluence are also available.
Community-ID is an OpenID implementation which is OpenID 2.0 compliant. It lets users keep track of their trusted sites and manage them. For Community-ID administrators, statistics are available to track registration of new users, authorized users per day or the number of trusted sites. Administrators can set the site in maintenance mode or send email messages to all registered users.