pandas
pandas development team (NumFOCUS) · DataFrames & array computing
The standard Python DataFrame library for labeled tabular data, time series and I/O to CSV, Excel, SQL, Parquet and more
BSD-3-ClauseOpen sourceFreeLocalNov 2, 2026
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Python
Python Software Foundation · Programming languages & runtimes
General-purpose, dynamically typed programming language with a large standard library and the dominant ecosystem for data science and machine learning
PSF-2.0Open sourceFreeLocalSelf-hostedBroken
QuantLib
QuantLib project (Luigi Ballabio and contributors) · Financial analysis & investing
Open-source C++ library for quantitative finance covering instruments, term structures, pricing engines and calendars, with Python and other bindings
BSD-3-ClauseOpen sourceFreeLocalNov 2, 2026
statsmodels
statsmodels developers (NumFOCUS) · Econometrics & causal inference
Python library for estimating statistical and econometric models with R-style formulas, rich result summaries and tests: OLS, GLM, discrete choice, ARIMA, state space, VAR and more
BSD-3-ClauseFreeOpen sourceLocalNov 2, 2026
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