Apache Arrow
Apache Software Foundation · Data catalogs & formats
Language-independent columnar in-memory format and libraries that let DuckDB, Polars, pandas, Spark and databases exchange tables without copying
5 tools
Apache Software Foundation · Data catalogs & formats
Language-independent columnar in-memory format and libraries that let DuckDB, Polars, pandas, Spark and databases exchange tables without copying
Apache Software Foundation · Analytical engines & OLAP
Extensible Rust query engine built on Apache Arrow offering SQL and DataFrame APIs, Parquet readers and an optimizer for embedding in data systems
dbt Labs (Fivetran + dbt Labs) · ETL/ELT & orchestration
SQL-first transformation framework that compiles templated models, tests and documentation into warehouse tables; open-source Core plus a commercial platform
Delta Lake project (Linux Foundation; created by Databricks) · Data catalogs & formats
Open table format with a transaction log over Parquet files, created by Databricks and hosted by the Linux Foundation, with Spark, Rust and Python implementations
Polars (Ritchie Vink and contributors) · DataFrames & array computing
Rust-based DataFrame library with Python, Rust, Node and R bindings offering lazy query optimization, multithreading and Arrow-native memory
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