Luiz Sobral

This plugin creates a floating menu set to the left position.
You can set: 
* Choose a custom menu 
* the color of the menu options: font e background 
* the vertical position of the screen
Set the options in Settings / Larbous Floating Menu

Larbous Floating Menu

This plugin creates a floating menu set to the left position. Set the options in Settings / Larbous Floating Menu

e-crespo

<ul>
<li>A fixed fancy navigation for your wordpress website. Perfect as an extra menu, or mobile auxiliar navigation, or to attract visitors to click those links.</li>
<li>Circular shaped with an appealing and modern look that opens when menu button is clicked. Works in modern browsers, both desktop and mobile (it was designed mobile-first).</li>
<li>Fully customizable through backend option panel: colors, sizes, icons, position, links, and much more. Visit <a href="http://wordpress-fixed-circular-nav.e-crespo.com/" rel="nofollow ugc">official website</a> to check feature list and view some demos and examples.</li>
<li>It was inspired by a codrops article, and now it has been fully developed to work in every modern browser and mobile devices.</li>
<li>Get it, install it in your wordpress backend and become different than the rest.</li>
</ul>
There is a free version and a pro version.
Feature list (both free and pro):
<ul>
<li>Fancy menu for your WordPress site.</li>
<li>Mobile-first developed and tested</li>
<li>Fully responsive for laptop and desktop big screens.</li>
<li>Light non-heavy scripted addition for your front-end site.</li>
<li>Fixed at bottom.</li>
<li>Choose from 12 built-in color schemes (inlcuding a transparent one),</li>
<li>Static text for the menu button</li>
<li>Set menu button color and color on hover</li>
<li>Set and play with relative sizes for icons and text so you can fit elements or try different menu experiences.</li>
<li>Each navigation element is fully customizable:</li>
<li>Set title attribute, icon or not, text or not, URL link or link to a WP post or link to a WP page and open in a new tab or not</li>
<li>Choose from more than 400 icons from the famous <a href="http://fortawesome.github.io/Font-Awesome/icons/" rel="nofollow ugc">FontAwesome</a> icon toolkit (already included)</li>
<li>Drag & drop to reorder navigations elements.</li>
<li>Translation ready and already translated to Spanish (languages files included)</li>
<li>WP Multisite compatible</li>
<li>Tested and compatible in all major modern browsers and mobile browsers.</li>
<li>Question & Answers forum available.</li>
</ul>
Visit some demos and examples in the <a href="http://wordpress-fixed-circular-nav.e-crespo.com/" rel="nofollow ugc">official site</a> and compare features or ask in the Q&A forum.
<blockquote>
Feature list (Only Pro version):
<ul>
<li>Highly customizable:</li>
<li>4 fixed positions: bottom, left, top, right.</li>
<li>Build your own color scheme for navigation elements.</li>
<li>4 built-in styles for the menu button that opens the menu:</li>
<li>text & symbol (+ and -), only text , only symbol (+ and -) or a standard navigation icon.</li>
<li>Or upload and use you custom icon/image for the menu button</li>
<li>Or use any FontAwesome icon for the button</li>
<li>You can set the text for the menu button</li>
<li>Choose colors for icons and texts</li>
<li>More relative sizes for your icons and texts, from tiny to huge.</li>
<li>Set and use a custom uploaded icon/image for navigation elements</li>
<li>Show the menu depending on screen size:</li>
<li>For all screens, only less than 768px (smartphones and small tablets) or more than 768px (common tablets, laptops and beyond).</li>
<li>Access Control Logic for users depending on their role:</li>
<li>Show menu to selected WP user roles or custom user roles.</li>
<li>Priority customer support</li>
<li>Free lifetime updates</li>
</ul>
</blockquote>
Customization services are available on request.

Fixed Circular Navigation Menu

Fixed fancy navigation, perfect as an extra or mobile auxiliar menu. Circular shaped with a modern look that opens when menu button is clicked

Larbous Floating Menu vs Fixed Circular Navigation Menu