R:

• https://cran.r-project.org/web/views/TimeSeries.html
• https://github.com/config-i1/smooth (stats forecasting)
• https://github.com/config-i1/greybox
• https://github.com/robjhyndman/forecast (stats forecasting)
• https://github.com/tidyverts/fable (stats forecasting)
• https://github.com/business-science/modeltime (stats + ml forecasting)
• https://github.com/business-science/modeltime.resample
• https://github.com/nredell/forecastML (ml forecasting)

Python:

• https://github.com/unit8co/darts (stats + ml forecasting)
• https://github.com/Nixtla/mlforecast (ml forecasting)
• https://github.com/Nixtla/statsforecast (stats forecasting)
• https://github.com/functime-org/functime (ml forecasting)
• https://github.com/sktime/sktime (stats + ml forecasting)
• https://github.com/aeon-toolkit/aeon (stats + ml forecasting)
• https://skforecast.org/ (stats + ml forecasting)