Seaborn

Seaborn, created and maintained by Michael Waskom, is a free, open-source Python data-visualization library built on matplotlib that provides a high-level interface for drawing attractive, statistically informative graphics. It covers relational plots (showing connections between variables), distribution plots, categorical plots for grouped comparisons, regression plots with statistical overlays, multi-plot grids for complex layouts, and built-in theming and color palettes — plus a newer "Objects API" for more flexible plot construction. Documentation and version history (currently 0.13.2, with archives back to 0.9) show a long, actively maintained history. As a Python plotting library, it's a developer tool rather than a point-and-click app — real value requires comfort writing Python and working with pandas DataFrames. Good fit for a data scientist or analyst who wants clean, publication-quality statistical charts from a few lines of Python rather than manually styling matplotlib plots.