Jess Mann

This plugin adds an additional admin page which shows you every registered 
widget, and allows you to deactivate any you do not want to appear. For 
example, when you are adding widgets to a sidebar, the Post Loop widget is 
usually not wanted, and just adds additional clutter you must sort through. On 
this widget’s admin page, simply click on the widgets you would like to 
disable, and then hit the “Save” button at the very bottom of the page!

Customize Widgets

Too many widgets cluttering up your wordpress install? This plugin allows you to hide unwanted widgets from the Appearance > Widgets panel, and any …

Aaron Holbrook

Hides noisy metaboxes from Dashboard for User 1. Generally used by Developers during site development, cuts down on load time and annoyances from dashboard widgets.

Hide Noisy Metaboxes

Hides noisy metaboxes from Dashboard for User 1. Generally used by Developers during site development, cuts down on load time and annoyances from dash …

Customize Widgets vs Hide Noisy Metaboxes