HD-QuickIcons is a modified version of Joomla's standard "Quick Icons" admin module (which is displayed on the main administrator control panel and is the first thing you see when you log in).
As useful as the current quick icon links module is, if you want to customize the links you have to amend the source code (which may be overwritten during an update). This module lets you easily change the layout, allowing you to display only the links you feel are necessary and relevant.
Hiding unnecessary icon links can also make the control panel seem less daunting for clients and reduces the risk of them wandering around in places where you don't want them.
Furthermore you are also able to provide more specific linking, so the Menu icon can now point to a specific menu (rather than to the menu manager as a whole) or the Template icon can point directly to a specific template (rather than to the template manager - which is still a further two clicks away from your current template page).