Pivot & Align Tools (PAT) are a set of macros bundled into a quad menu (or a single quad list) that allow you to perform various object alignment, pivot alignment and object snapping functions, among others. Most of the functions can operate on a selection of multiple objects at once, including grouped objects as part of the selection (open or closed).
There's a PDF guide available in the Help menu item and also attached below.
Two pre-configured styles available...