The Maya Selection Editor, brought it back cuz I like it.

This is the original selection editor, just regurgitating, I am clearly not the author:


Put this in your userSetup.mel
//Selection Editor
source AddSelectionEditorToEditMenu.mel;


The Mel script is here, put in your scripts folder:
http://www.uberware.net/mel/#selectionEditorWin

Then upon a fresh maya startup it should be located here:

Also you can make a shelf button, just pop this into the command:
selectionEditorWin;