Blog theme allows users to have persistent themes for their blogs based on the theme they choose for their account. When others view thier main blog page, or any node (of specific admin-defined types) created by them, the reader will see the authors theme instead of their own.
This module provides a "site map" style page overview of all the categories within a site with node titles and a side bar menu to navigate the site by category
This module creates a field to choose a year, month, and then a week. It can then be used in views to filter by the week, rather than having to use a date range.