biolab/orange3

Built on a modular widget-canvas architecture, Orange chains reusable data processing and visualization components into workflows without requiring code—the core canvas and widget framework separate GUI concerns from data mining logic. Extensible through a growing ecosystem of domain-specific add-ons (text mining, bioinformatics, time series, image analytics, etc.), it leverages PyQt for the desktop interface and integrates scikit-learn-compatible algorithms for machine learning tasks.

5,573 stars and 33,517 monthly downloads. Actively maintained with 13 commits in the last 30 days. Available on PyPI.