jweblog

Use this QRCode Generator wordpress plugin to create a image QRCode on any site of your WordPress installation. Use a shortcode in your posts to insert dynamic, customizable posts, pages, images, or attachments based on categories and tags. Visite http://qrcode.jar.io for more information.
The shortcode [qrcode] within your site to generate a qr code including the URL of the current site. This plugin is offered freely by QRCode Generator API Online [qrcode.jar.io].
If you find this plugin useful, please rating this plugin on [https://wordpress.org/extend/plugins/api-qrcode-generator/]
Check website for live demo [http://yoga.jar.io/]
How to use:
<ul>
<li>
Use the shortcode [qrcode] within your site to generate a qr code including the URL of the current site
</li>
<li>
Use the fullowing short code to generate a indivdual qr code with any text content: 
[qrcode content=”text” size=”150px” alt=”text” class=”text”]
</li>
</ul>
<h3>Author</h3>
Jweblog 
“Programming usefull codes for good internet!” 
(http://github.com/jweblog “WP-QRCode Generator”)

API QRCode Generator

Use QRCode Generator to create a image QRCode on any site of your blog.

dweius

QutenizeR plugin for wordpress allows you to easily create personalized and colorful QR codes on the fly. <a href="http://qutenizer.com" title="qutenizer.com" rel="nofollow ugc">QutenizeR.com</a> is a free online Web service (beta) that generates full-color personalized QR codes on the fly. QutenizeR plugin for WordPress connects to it and get the images without leaving your blog’s admin pages. Feedback will be welcome. 
Enjoy this plugin!
This plugin uses Jan Odvárko’s JSColor available at http://jscolor.com

QutenizeR

QutenizeR plugin for WordPress is a funny way to easily create cute & colorful QR codes.

API QRCode Generator vs QutenizeR