ACL / Roles + Permissions
https://github.com/djvirgen/virgen-acl Simple and elegant, create your own checks. No middleware?
https://github.com/OptimalBits/node_acl Use as middleware, create your own roles and access. Great choice.
https://github.com/tschaub/authorized Similar to connect roles... but a bit more robust? you can create roles and action, and associate many roles with that action