mbdNnse

This plugin allows you to create a responsive, sticky, fixed bar at the top of your website. Place any pieces of information you want there like social media icons, contact info, or any text/image. Simple and easy to use. You can set the background color, text color, fixed height (or just make it auto).

Contact and social sticky bar

This plugin will display a responsive, sticky bar at the top of your website with the information you provided.

followalter

This plugin makes the right sidebar on post.php pages (where you edit a post) stick to the top of the screen when you scroll, so all functions of the sidebar stay within reach. It works with the classic version of the editor.
If the total height of the sidebar is larger than the window height, the sidebar sticks to the bottom instead, so the whole sidebar can be made visible through scroll.
On top of this, when you publish or update a page, the plugin will make the page scroll down to the previous scroll position.
This saves users from both having to scroll up (because of the stickiness) and having to scroll down again (using the previous scroll position) every time they update a post!

Admin Sticky Sidebar

This plugin makes the right sidebar on post.php pages (where you edit a post) stick to the top of the screen when you scroll, so all functions of the  …

Contact and social sticky bar vs Admin Sticky Sidebar