License and Distribution

ReSpect is distributed as proprietary software at no cost and is currently available as OpenMP parallel static binaries for Linux OS and x86_64 architecture. The program is limited to non-commercial, academic, and non-profit private use and its further copy, modification, redistribution or sublicense in whole or in part is not permitted.
In particular, these specific terms of use apply:

• The use of ReSpect is restricted to non-commercial, academic, and non-profit private use and includes installation, execution, and display of data generated with the software for the purpose of research, education, and academic publishing. The experimental nature of ReSpect means that there is no warranty of correctness of results nor fitness for a particular purpose, and the authors of ReSpect cannot be held responsible in any way for any consequences arising from the use of the program.
• Excluded from the use of ReSpect are research activities for commercial purposes, including collaborations or cooperations with non-academic partners, private companies, non-profit or governmental organisations.
• Expressly excluded from the use of ReSpect are research activities for military purposes.
• It is prohibited to transfer ReSpect or make it available to third parties in any form. In particular, it is not permitted to sell, rent, copy or give ReSpect to someone or sublicense it in any other way, or to redistribute ReSpect or make it accessible publicly or via cloud services.
• ReSpect is licensed for private use to single users as well as research groups. For a research group, the research group leader is responsible for the compliance of their group with these conditions.
• If results obtained with ReSpect are published in the scientific literature or publicly accessible reports, the users shall reference the program as:
  ReSpect: Relativistic spectroscopy DFT program package
  M. Repisky, S. Komorovsky, M. Kadek, L. Konecny, U. Ekstrom, E. Malkin, M. Kaupp, K. Ruud, O. L. Malkina, and V. G. Malkin, J. Chem. Phys. 152, 184101 (2020)
  and
  X2C Hamiltonian Models in ReSpect: Bridging Accuracy and Efficiency
  M. Repisky, S. Komorovsky, L. Konecny, M. Kadek, T. Moitra, M. Joosten, D. Misenkova, R. Vikhamar-Sandberg, M. Kaupp, K. Ruud, O. L. Malkina, and V. G. Malkin, J. Phys. Chem. A 129, 7980 (2025)
  Using specific methods included in ReSpect may require citing additional articles, as described in the program output and online documentation available on this website.

If you are unsure whether you are eligible for the software license, please contact us at info@respectprogram.eu. All eligible users can download ReSpect's OpenMP parallel static binaries for Linux OS and x86_64 architecture from the following link.