Chroma
Chroma · Vector databases
Open-source embedding database with a minimal Python and JavaScript API, usable in-process, as a server or through Chroma Cloud
Apache-2.0Open sourceUsage-basedLocalSelf-hostedNov 2, 2026
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Dagster
Dagster Labs · ETL/ELT & orchestration
Asset-oriented Python orchestrator that models pipelines as software-defined data assets with lineage, checks and a hosted Dagster+ option
Apache-2.0Open sourceFreemiumLocalSelf-hostedRedirected
Interactive Brokers API
Interactive Brokers LLC · Financial analysis & investing
Programmatic trading and market-data access to Interactive Brokers accounts through the TWS API, the REST-based Web API and FIX
ProprietaryUsage-basedPaidLocalRedirected
Polars
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
MITOpen sourceFreeLocalNov 2, 2026
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