For creating Ponchon and McCabe diagrams for mass transfer, users are seeking downloadable software options. While some participants suggest that manual calculations can yield accurate results, they acknowledge the desire for precision that software can provide. The discussion emphasizes the importance of thermodynamic data and suggests starting with a simple model for one equilibrium stage before expanding to multiple stages. Challenges such as plotting equilibrium data are noted, but they can be managed with careful strategy. A resource for free software related to the McCabe-Thiele method is shared, although its reliability is unverified. Overall, the conversation highlights a balance between manual methods and the potential benefits of using software for accuracy.