dpeterson1971

Important: This plugin works with every theme that uses the recommended WP function for displaying the title. For other themes, that display the title using a lesser know method, it might not work.
This plugin adds a simple metabox beside the post creation form in the WordPress admin interface, allowing you to toggle the visibility of the title. Unlike some of the other similar plugins available in the WordPress repository, it completely removes the title instead of just hiding with CSS or JavaScript.
Some advantages of using this plugin:
** Does not affect admin area:** 
Before removing the title it checks to make sure that the front-end is being displayed and the current point is within the loop.
Works with all post types: 
To hide the title you just have to use a checkbox on the post creation form. This checkbox is displayed in the form of a metabox for all post types.

WP 4 Me Title Remover

Gives you the ability to hide the title of any post, page or custom post type item without affecting menus or titles in the admin area.

ausafmalik89

Remove Category Word From Title is basically used to remove the word Category: from the title when comes when you create a menu as a category. This plugin doesn’t requires any setting, you just need to install and activate it.

Remove Category Word From Title

Remove Category Word From Title is basically used to remove the word Category: from the title when comes when you create a menu as a category.

WP 4 Me Title Remover vs Remove Category Word From Title