Billiard: Improved Python Multiprocessing

billiard is a robust fork of the Python 2.7 `multiprocessing` package, actively maintained by the Celery project. It provides numerous improvements and bugfixes over the standard library's `multiprocessing` module, offering enhanced process-based parallelism for Python applications. It aims to address specific challenges and performance bottlenecks, particularly in distributed task queue systems like Celery, where it serves as a core dependency. The library is under active development with a consistent release cadence.