Category Description Searcher - Allows free-text searching of category descriptions, and listing of category descriptions for a branch. ODP::Passport enables an inbuilt spell checker.
Create a Tree - Bookmarklet Generator - Lets you make a bookmarklet that you use on any category, to create a template set of subcategories, with just one click.
Produce an Editall Friendly Request - Allows you to produce an editall friendly sort priority, move/rename, delete, @link, related category, or turn off add URL/become an editor links request. It accepts input in a variety of formats.
Reports - A collection of guideline and heuristic reports showing potential problems with categories and sites.