Hung Trang Si

Plugin help hide all posts in one or more category on your homepage.
Go to “Settings » Reading”to choose the category need to hide

Simple Exclude Categories

Hide posts in categories on WordPress Homepage

zugrina

Small plugin that allows you to exclude pages or posts from WordPress administration post/page listing. It also works with custom post types. Pages or posts can be excluded per user role.
One good example would be a login page with a shortcode for login form. You want to make sure that this page is not deleted by accident.

Tailored Easy Exclude

Small plugin that allows you to exclude pages or posts from WordPress administration post/page listing, and post/page can be excluded per user role.

Simple Exclude Categories vs Tailored Easy Exclude