That packages is a helm extension for selected.el. selected.el provides a combined keymap with associated commands for the selected region like a popup menu when you right-click on a selected word in your document. The menu, however, will not be displayed in an emacs buffer. So this package provides a visible menu with command candidates by supporting of helm interface.
(with-eval-after-load "selected"
(when (require 'helm-selected nil t)
(define-key selected-keymap (kbd "h") 'helm-selected)))After you select a region in your emacs buffer, just type h, then a command menu will be popping up.
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