Products.remember is a full implementation of the default Plone member configuration using content to represent membership accounts. It is built on top of Products.membrane. Out of the box, Products.remember should work very much like a regular Plone membership accounts, except that member information is stored in Member objects that are (by default) stored in the portal_memberdata tool.
Products.remember 1.9 works with Plone 4+ and Products.membrane 2+. It does not suppport Plone 3 and Products.membrane 1 - for that, see instead versions of Products.remember before 1.9, eg 1.1b3. Visit http://pypi.python.org/pypi/Products.remember for the index of all available Products.remember releases.
Products.remember is a successor to CMFMember, which will not work with PluggableAuthService-based user folders, and thus will not work with a contemporary Plone (2.5 and greater) installations. Products.remember 1.1b3 provides a migration path for existing CMFMember-based sites.
For questions and support, please see the Remember mailing list: http://www.openplans.org/projects/remember/lists/remember/