README
Lets-Plot
Lets-Plot is a multiplatform plotting library built on the principles of the Grammar of Graphics.
The library design is heavily influenced by Leland Wilkinson's work The Grammar of Graphics describing the deep features that underlie all statistical graphics.
This grammar [...] is made up of a set of independent components that can be composed in many different ways. This makes [it] very powerful because you are not limited to a set of pre-specified graphics, but you can create new graphics that are precisely tailored for your problem.
- Hadley Wickham, "ggplot2: Elegant Graphics for Data Analysis"
Grammar of Graphics for Python 
A bridge between R (ggplot2) and Python data visualization.
To learn more, see the documentation site at lets-plot.org/python.
Grammar of Graphics for Kotlin 
Notebooks
Create plots in Kotlin Notebook,
Datalore, Jupyter with Kotlin Kernel
or any other notebook that supports Kotlin Kernel.
To learn more, see the Lets-Plot Kotlin API project at GitHub.