Observable
Observable, Inc. · Notebooks & interactive computing
JavaScript data notebooks and the open-source Observable Framework static-site generator for data apps, from the maintainers of D3 and Plot
ISCFreemiumPaidLocalNov 2, 2026
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RStudio IDE
Posit Software, PBC · Mathematical & statistical computing
Posit's open-source integrated development environment for R, with console, editor, plots, environment panes, Quarto/R Markdown authoring and Python via reticulate
AGPL-3.0-onlyFreeOpen sourceLocalSelf-hostedNov 2, 2026
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