Categories Widget: Top Level Only, Busiest First
Makes the Categories widget list only top-level categories and sorts them by number of posts, so a long category tree becomes a short list of your main sections.
Snippet Library
Widgets snippets for WordPress
Snippets for widgets and sidebars: restore the classic widget screen, register new widget areas, remove default widgets and allow shortcodes in text widgets. For classic themes and sites that still lean on sidebars.