• nice overview of all the stacks used on your site
• a lot more info than the core's 'Stacks' provide:
  stackname, cID, cvID, Author, DateModified, Approver, Approved, Global
• sort stacks on all available fields within the list
• scroll throughout the stacks (also global) and preview selected stacks within the manager, without reloading the page
• easily see if stacks need approval (workflow)
• 'Used By': find out where a stack is being used (also searches some add-on blocks!!, template function included to add it to your own block)
• options: add stacks, edit stack (in preview), Add (block), Rename, Permissions, Version history, Used by, Duplicate, Delete, Submit to workflow, Approve
• move the unsorted order of stacks (same as original Stacks)
• Stack Manager is added to the dashboard

'Used By'

With the 'Used By' button, you can track down where a stack is being used. Stack Manager searches your site for reference to this stack. Not only for Concrete5's standard way of using stacks. It also supports - or is supported - by some add-on blocks:

Stack Randomizer, VR Tabs Lite, Enlil Genetic Stacks