Niels van Dijk presents information on OpenConext, an open source identity and access management platform developed by SURFnet. OpenConext allows for centralized authentication, group management, and integration of applications. It serves as an identity federation hub for the Netherlands and has also been adopted by other research and education networks in other countries. The document outlines OpenConext's building blocks and describes how it facilitates collaboration through features like federated authentication, centralized groups, and attribute sharing.