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arch (Python package)

Kevin Sheppard · High-frequency financial analysis

Kevin Sheppard's Python package for univariate ARCH/GARCH volatility models, bootstraps, multiple-comparison procedures, unit-root and cointegration tests

NCSAFreeOpen sourceLocalNov 2, 2026

ClickHouse

ClickHouse, Inc. · Analytical engines & OLAP

In-depth entry

Open-source columnar OLAP database server for fast aggregations over billions of rows, with MergeTree storage, SQL and a managed ClickHouse Cloud

Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026

DuckDB

DuckDB Foundation / DuckDB Labs · Analytical engines & OLAP

In-depth entry

In-process analytical SQL database that queries Parquet, CSV and Arrow data directly from Python, R, Node or the CLI

MITOpen sourceFreeLocalSelf-hostedNov 2, 2026

linearmodels

Kevin Sheppard · Econometrics & causal inference

Python package by Kevin Sheppard adding panel data, instrumental-variable, system (SUR/3SLS) and asset-pricing estimators missing from statsmodels

NCSAFreeOpen sourceLocalNov 2, 2026

Polars

Polars (Ritchie Vink and contributors) · DataFrames & array computing

In-depth entry

Rust-based DataFrame library with Python, Rust, Node and R bindings offering lazy query optimization, multithreading and Arrow-native memory

MITOpen sourceFreeLocalNov 2, 2026

statsmodels

statsmodels developers (NumFOCUS) · Econometrics & causal inference

In-depth entry

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

TimescaleDB

Tiger Data (formerly Timescale) · Relational databases

PostgreSQL extension for time-series data adding hypertables, compression and continuous aggregates, from the company now named Tiger Data

Apache-2.0 AND LicenseRef-Timescale-LicenseOpen sourceFreeSelf-hostedNov 2, 2026

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