DeliverPoint :Permissions with Trial License Download and try the only security trimmed SharePoint permissions tool on the market.  Comes packaged with a 30 Day Trial so you can try before you buy.  For use with Microsoft Office SharePoint Server 2007 and Windows SharePoint Services 3.0.

DeliverPoint License Prep Tool (LPT) Reports important information about your SharePoint Farm to aid in licensing DeliverPoint when DeliverPoint is not currently installed, such as CALs and Installation ID. For use with Microsoft Office SharePoint Server 2007 and Windows SharePoint Services 3.0.

(Zoom)

SharePoint 2007 Permissions Roadmap The SharePoint 2007 Roadmap will give you a visual picture of the base permissions which make up Out-of-Box permission levels, provide the definition of each base permission, as well as help you understand the dependencies between base permissions.