LinkBlock
The LinkBlock widget arose from high dissatisfaction with the default WordPress blogroll widget, which displays all links from all categories. Early in WP 2.x development, this was easy to address - unfortunately, later editions of WP altered the way link categories worked, and LinkBlock hasn’t quite caught up yet, but it’s still highly useful.
As a widget, it allows you to provide a title, and specify which link category you want displayed, and it allows you to instantiate the widget multiple times to display multiple categories in your widget areas.
