pvs1984

With horizontal tabs plugin you can add 3 tabs that each of them contains unlimited posts. Each tab shows the featured image and the title of each post
<ul>
<li>option to select the category of post in each tab</li>
<li>option to select the width and the height of feautured image</li>
<li>option to select the number of post in tabs</li>
</ul>

Horizontal Tabs Plugin

Horizontal tabs plugin enable to show unlimited posts in 3 tabs

Eddie Krebs

Horizontal Admin Menu moves your existing WordPress admin menu to the top of the screen. Existing submenus show 
as drop-down menus when you mouse over a top level menu. This lightweight plugin alters existing WordPress 
styles so the menus match the default admin theme. Each admin user may choose to turn this feature on or off from 
the WordPress Profile editor.
Each user may also choose the option to optimize for 1024×768 resolution, which will resize the admin screens to 
980 pixels wide. In this mode, if there are more than eight top menus, they will wrap to the next line.
This plugin was tested in IE7, IE8, IE9, Chrome, Firefox and Safari.

Horizontal Admin Menu

Move your admin menu to the top of the screen!

Horizontal Tabs Plugin vs Horizontal Admin Menu