*** First Call for Demos and Tools *** International Conference on Software and Systems Reuse, Product Lines, and Configuration (VARIABILITY 2026) 29 September - 2 October 2026, 5* St. Raphael Resort and Marina Limassol, Cyprus https://conf.researchr.org/home/variability-2026 VARIABILITY is a new conference that has been merged of three prominent conferences focussing on software and systems variability, configuration and reuse: SPLC (the International Systems and Software Product Line Conference, 29 successful editions, ranked as a top conference), VaMoS (the International Working Conference on Variability Modelling of Software-Intensive Systems, 19 successful editions), and ICSR (the International Conference on Systems and Software Reuse, 22 successful editions). The Demos and Tools Track at VARIABILITY 2026 invites compelling live presentations and submissions of innovative tools, practical demonstrations, and curated datasets that support research and practice in software and systems product line engineering, reuse, and configuration. This track provides a forum for researchers and practitioners to showcase academic or commercial tools, demonstrations of novel techniques, and datasets that contribute to the advancement of software and systems reuse, software product lines and configurable systems. Accepted contributions will be featured both during the main conference (via oral presentations) and in interactive exhibition spaces (e.g., demo booths or poster/demo sessions during breaks). This track provides an opportunity to illustrate the practical impact of new ideas and to foster interaction between researchers and practitioners that address real-world variability challenges. Topics of Interest We welcome submissions on all topics related to tool support and datasets for product lines and variable/configurable software systems, including (but not limited to): Core Product Line Engineering Techniques • Feature modeling • Variability management • Product Line Architecture • Validation and verification • Product derivation and generation, including build systems and CI • Product-line testing and further analyses • Optimization and measurement of non-functional properties • Language product lines Application Domains and Contexts • Software-intensive and cyber-physical systems • Web and cloud-based systems, including microservices • Internet of Things • Automotive and industrial automation • Consumer electronics • Software ecosystems and multi-product lines Submission Guidelines Submissions must describe either (1) a new tool or prototype; (2) a novel extension to an existing tool; (3) a practical demonstration of an approach; (4) a new or curated dataset relevant to variability and reuse; (5) a significant update to a previously published tool or dataset (include a clear description of new contributions). Each submission must include: • A paper of up to 4 pages, including references and figures. • An optional appendix of up to 2 pages (not included in the proceedings), describing the planned live demonstration or dataset usage scenario. • A link to a short video (max. 5 minutes) illustrating the tool, demonstration, or dataset in action. Papers should briefly describe the theoretical foundation, with a focus on practical aspects such as software architecture, implementation decisions, usage methodology, and validation through case studies or benchmarks. Public availability of tools and datasets (preferably under open-source/open-data licenses) is strongly encouraged. Where availability is not possible, submissions should explain the reasons. All submissions must adhere to the LNCS (Springer) format. Please refer to the official LNCS template at https://www.springer.com/gp/computer-science/lncs/conference-proceedings-gui... . Submissions must be in PDF format and submitted via EasyChair: https://easychair.org/my/conference?conf=variability2026 (select “Demonstrations and Tools Track”). Evaluation Criteria Each submission will be reviewed by at least three members of the Program Committee. Reviewers will evaluate: • Relevance to the VARIABILITY community • Technical soundness and artifact maturity • Novelty of the contribution • Quality of the written description and video demonstration • Clarity in the presentation of implementation details, usage, or dataset structure • Positioning with respect to existing tools/datasets/practices This track follows a single-blind review process. Presentation and Publication Accepted papers will appear in the VARIABILITY 2026 Companion Proceedings, published in the Springer Lecture Notes in Computer Science (LNCS) series. At least one author of each accepted paper must: • Register for the full conference, and • Present the contribution at the event. Important Dates (AoE) • Submission of Demos and Posters: 1 June 2026 • Notification of Acceptance: 21 June 2026 • Camera-Ready Submission: 15 July 2026 • Author Registration: 15 July 2026 Organisation General Chairs • George A. Papadopoulos, University of Cyprus, Cyprus • Gilles Perrouin, FNRS & University of Namur, Belgium Research Track Chairs • Thorsten Berger, Ruhr University Bochum, Germany • Ina Schaefer, KIT, Germany Industry Track Chairs • Shaukat Ali, Simula Research Lab and Oslo Metropolitan University, Norway • Martin Becker, Fraunhofer IESE, Germany Journal First Track Chairs • Mathieu Acher, University Rennes, Inria, CNRS, IRISA, France • Xhevahire Tërnava, LTCI, Télécom Paris, Institut Polytechnique de Paris, France Doctoral Symposium Track Chairs • Rick Rabiser, LIT CPS, Johannes Kepler University Linz, Austria • Iris Reinhartz-Berger, University of Haifa, Israel Demos and Tools Track Chairs • Sandra Greiner, University of Southern Denmark, Denmark • Leopoldo Teixeira, Federal University of Pernambuco Projects Showcase Chairs • Daniel Struber, Chalmers, University of Gothenburg, Radbound University, Sweden • Dalila Tamzalit, Nantes Université, France Hall of Fame Chairs • Martin Becker, Fraunhofer IESE, Germany • Goetz Botterweck, Lero - The Irish Software Research Centre and University of Limerick, Ireland • Natsuko Noda, Shibaura Institute of Technology, Japan Workshops Chairs • Lidia Fuentes, Universidad de Malaga, Spain • Malte Lochau, University of Siegen, Germany Tutorials Chairs • Loek Cleophas, Eindhoven University of Technology and Stellenbosch University, The Netherlands • Mahsa Varshosaz, IT University of Copenhagen, Denmark Proceedings Chair • Sophie Fortz, King's College London, UK Publicity Chairs • Wesley Assunção, North Carolina State University, USA • Kentaro Yoshimura, Hitachi Ltd, Japan Local Organiser and Finance Chair • George A. Papadopoulos, University of Cyprus, Cyprus