Windows: You have a bunch of sub-directories that you’d like to consolidate into one but don’t want to do the mouse work or write a batch script. Suction will help you condense your directories.
There are two ways to interact with Suction. You can launch the Suction executable as a portable application and use the drag and drop interface—the drop box is seen in the background of the screenshot here—and all dropped folders and their recursive folders and files will be transferred to the consolidation folder you have specified. Alternatively you can save Suction to a permanent location and add a right-click menu item for Suction, allowing you to highlight folders and right click to send them to the consolidation folder.
You can also enable deletion of duplicate files and deletion of empty directories, although the duplicate file search appears to be based strictly on file names. If you need a more versatile duplicate search, check out previously reviewed Fast Duplicate File Finder to tidy up before you consolidate with Suction. Suction is portable freeware, Windows only.