Crate is a PyPI Mirror/Python Package Index that was written to make it easy to discover packages, evaluate them for usefulness, and then install them. Additionally it also focuses on presenting an extremely stable interface to PyPI compatible applications (e.g. pip).
With Crate you should be able to quickly find, evaluate, and install your packages with no worries about if something is going to be down or not.
Crate.io is built on top of Python using the Django framework. It uses Celery to process it's shared tasks, PostgreSQL to store it's data, and Redis as it's caching layer.
Relation to PyPI
The software that powers Crate.io defaults to PyPI, but can techincally be used with any index that presents the same XMLRPC API.
Crate.io the website currently only mirrors PyPI. All Packages, and their associated data comes from PyPI. Crate.io provides a reliable place for those packages to be stored and accessed at and tries to present a cleaner and more user friendly interface to that data.
@@@ Todo Write Development Docs