JASP - JASP, a low fat alternative to SPSS, a delicious alternative to R.
Statista - The Statistics Portal for Market Data, Market Research and Market Studies
RStudio - RStudio™ is a new integrated development environment (IDE) for R.
Jupyter - Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.
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PSPP - PSPP is a free software application for analysis of sampled data.