tomoya

This plugin widget is very simple. 
The list of the entry can be displayed in the sidebar by specifying a favorite category when this plug-in is used.

Limited Category Lists Widget

Limited Category Lists Widget is a wordPress widget, lists the limited category as shown in the name.

jimmywb

This plugin makes a widget available which allows you to add a simple link list (bulleted or numbered) to a sidebar.

Simple Link List Widget

This plugin makes a widget available which allows you to add a simple link list (bulleted or numbered) to a sidebar.

Limited Category Lists Widget vs Simple Link List Widget