This anthology marks the conclusion of the virTUos project – virtual teaching and learning at TU Dresden in an open source context, which was funded by the Foundation for Innovation in Higher Education Teaching between 2021 and 2025 as part of the “Strengthening University Teaching through Digitalization” funding line. The volume brings together key developments and findings from the subprojects, traces their diverse technical perspectives, and shows how new ideas and solutions were formed in collaborative work with our partners. As a supplement to the already published Open Educational Resources (OER), the documented Open Educational Practices (OEP), and the white paper of the virTUos prospects, it offers a coherent framework and an overarching conceptual classification.