Auth MemCookie is an Apache v2 authentication and authorization module based on a cookie authentication mechanism. The module doesn't do authentication by itself, but verifies if the cookie used for authentication is valid for each URL protected by the module. The module also validates whether the authenticated user has authorization to access the URL. Authentication is done externally through an authentication form page, and all authentication information necessary to the module is a stored in memcached.
Sleutel is a multi-platform password manager that is written using the Eclipse Rich Client Platform (RCP). Its goal is to manage password/ID pairs for accessing Web sites and to provide an example RCP application. It features configurable password generation, labeling of password entries (a la GMail), an intuitive UI following the Eclipse model, merge capabilities, and the ability to track usage count and dates of password entries. Sleutel is the Dutch word for key.
OpenSAML is a portable implementation of the Security Assertion Markup Language (SAML) standard for the formation and exchange of authentication, attribute, and authorization data using XML, as defined by OASIS. There are interfaces for a range of languages, including C++ and Java.
OpenXPKI is a Web and CLI-based enterprise-grade PKI/trust center system (X509 public key infrastructure) complete with CA, Web interfaces, offline support, and support for well established infrastructure components like RDBMS and Hardware Security Modules. Flexibility and modularity are the project's key design objectives. Unlike many other PKI solutions, it offers powerful features necessary for professional environments. However, small scale installations are also targeted by providing quick-start configuration examples that allow you to get a usable PKI running quickly.