Looking for a Web Development Platform/Framework

Hi,

I need to build a registration based web application. This would have
functionality for managing people/entities (logins, accounts, profiles),
roles/permissions, registration products (membership, events, etc.). I
imagine that there must be some libraries/application/framework that
implement the boilerplate functionality (e.g. sessions, accounts,
registration processes, payments/orders, etc.).

What doesn't fit the bill you ask? CMS (Content Management Systems) and
Portals - these are far to focussed for their purpose and not extensible
enough to the registration products.

Do you know of any libraries/application/framework that might fit the bill?
Any language is fine.

Thanks
J