Newman

This plugin allows you to hide plugin update notifications for wordpress plugins that you do not want to update. 
 Once this plugin is installed and activated, a link will appear under each plugin with available updates that will allow you to block notifications for that update. Once hidden, a link will appear allowing you to unhide the notifications.
This plugin uses WordPress hooks and filters to hide the notifications.

Plugin Update Hider

This plugin allows you to hide plugin update notifications for wordpress plugins that you do…

Josh Hartman

Command your admin dashboard. Manage built-in widgets (Right Now, Recent Comments, etc.) and dynamically registered widgets (Google Analytics Summary, WP E-Commerce Dashboard, etc.). Hide widgets depending upon user capabilities.
This plugin is based upon Dave Kinkead’s Dashboard Heaven plugin and extends it to support dynamically registered widgets, such as dashboard widgets that are added by a plugin.
After installation access to all dashboard widgets is removed, then you can use the options at Settings > Dashboard Commander to configure the minimum access level for each widget.
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Dashboard Commander

Command your admin dashboard. Manage built-in widgets and dynamically registered widgets. Hide widgets depending upon user capabilities.

Plugin Update Hider vs Dashboard Commander