In the last decade, the idea of open source software, as well as open data has evolved, and more scientific software is not only freely usable but the source code is published under the terms of an open source licences, such as GPL or 3 MIT. In contrast to SupraFit, the available open source programs are mainly focused on computational chemistry and chemoinformatics. Some common tools used to analyse supramolecular titration experiments will be listed in the next section, however without any claim to completeness.