Andy Feliciotti

This plugin adds a “Unlisted?” checkbox in the “Publish” box while using the classic editor and Gutenberg. When this is checked the post will be excluded from most areas of your website by filtering pre_get_posts filter. This means posts will be excluded from RSS feeds, blog pages, widgets, category pages, archive pages, and more. Additionally it adds a noindex tag to the unlisted page to prevent Google from indexing the page. This is useful if you want to publish some information on your site and allows others to view it via the link without fully publishing.
Features
<ul>
<li>Simple checkbox to unlist posts when publishing a post</li>
<li>Allows you to hide posts from most areas of your site</li>
<li>Add a noindex tag to pages that are unlisted</li>
</ul>

Unlisted Posts

Allows you to easily exclude posts from feeds, category pages, blog pages and more using one checkbox on posts.

MohammadJafar Khajeh

Some sites have posts that haven’t title. This posts are so annoying. Some of these posts created by plugins. 
There’s a plugin can solve this problem with many ways. “Hide posts without post title”(HPWPT) hide posts that hasn’t title. You can choose what post type you want to hide posts. Also you can choose posts you want to show(Even havn’t post title). 
HPWPT will hide posts from list tables in admin side and store them in separate section for each post type you want. 
You can in HPWPT choose to hide posts from frontend and RSS feed. Again: For each post can change these options.
<h4>One more thing about it:</h4>
HPWPT uses i18n, So you can translate it for your language.

Unlisted Posts vs Hide posts without post title