Geraldo Pena Perez

WordPress Widgets are really great to keep the elements on your site modular and reusable. They have the option to have their title in them if you want to. However, this field is optional, and you leave it empty for those cases you don’t wish to display a title in the frontend. What about those times you have to stack many widgets into a sidebar without titles.
WordPress by default only includes the widget type as the name of the widget in the title bar when the title is not included, making it impossible to have an accurate reference of the function of that specific unit. That is where this plugin comes in handy.
This plugin will create an extra field on every widget in the Appearance -> Widgets area (not available in the Customizer) named “Widget title” that will allow you to have a custom title for that Widget. You can just leave this field blank when you want the default titles from WordPress.
Enjoy!

Custom Admin Widget Titles

This plugin allows you to input nice looking and descriptive widget titles in your admin widget area.

steve228uk

Limit post titles with a character limit within the WordPress dashboard. The plugin works with default post types (posts/pages) as well as any custom post types defined by plugins or themes.
Simply set the character limit in the plugin’s settings pane and check which post types you wish to limit.
The title is limited within the dashboard only and pre-existing titles may need to be updated to match the new limit.

Limit Post Titles

Just wanted to let everyone know that this plugin does not work with the block editor (default editor since WP 5.0), so don't waste your time installing it if you plan to use it with the block editor

doesn't work with block editor

Limit post titles (including pages and custom post types) within the WordPress dashboard.

Custom Admin Widget Titles vs Limit Post Titles