Nimble: prepared Grails application base

Nimble is an "Application Base for Grails", a base set of components that all web applications require to function.

Nimble provides

Flexible authentication sources including locally hosted accounts, Facebook and OpenID. In the near future we plan to have support for LDAP, SAML 2.x and more
Fine grained access control from the web tier through to backend service logic. Permissions can be applied to users, roles and groups. Users can be members of an unlimited number of groups. Both users and groups are able to be assigned roles. Enabling permissions to cascade through this structure is where Nimble gains its real access control flexibility. All of this is dynamic and modifiable at run time.
User profiles and social features such as status updates. We've only scratched the surface of what is possible here and hope to really expand this in the future.
A gorgeous set of interactive UI's to manage all of the above.