Show Widgets Only on Certain Page Types
Adds a "Show on" setting to every classic widget, so you can limit it to the homepage, single posts, blog and archive pages, or everywhere except those.
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.
Show Widgets Only to Logged-In or Logged-Out Visitors
Adds a "Show to" setting to every classic widget so you can display it to everyone, only to logged-in users, or only to visitors who are not logged in.