New developments in the PuffinPlot paleomagnetic data analysis program

PuffinPlot is a program for paleomagnetic data analysis and plotting, first released in 2012 and under continuous development since then. It is free, cross-platform software and provides both a graphical desktop interface for interactive use and an application-programmer interface for scripting. We present a major new release of the program, describe significant new features added since the first release, and demonstrate their application to real-world data. New features include automatic magnetic declination realignment, relative paleointensity calculation, virtual geomagnetic pole determination, calculation of inclination-only statistics, support for reproducible research via the export of self-contained data bundles, and support for reading a number of popular paleomagnetic file formats. We also discuss the application of unit tests in ensuring PuffinPlot's long-term reliability and outline directions for future development of the software.