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:
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Use the shortcode [qrcode] within your site to generate a qr code including the URL of the current site
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Use the fullowing short code to generate a indivdual qr code with any text content: 
[qrcode content=”text” size=”150px” alt=”text” class=”text”]
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</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.

Rene Hermenau

Use this qr code wordpress plugin to create a qr code on any site of your WordPress installation. Content can be any text or the current URL of the site where it is embeded.
How to use it:
<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=”CONTENT” size=”120″ alt=”ALT_TEXT” class=”CLASS_NAME”]
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<li>
It`s not neccessary to give any parameters!
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Possible parameters are: alt, size, class, credit, shadow
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If you don`t give any parameter like ‘alt’ or ‘size’, the standard parameters are: 
alt = “Scan the QR Code” 
size = 120 
class=”” 
credit = true 
shadow = true
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</ul>
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The credit option gives a really small but nice looking image link on bottom of the qrcode. If you don´t like it or don´t want to give me any credits you can deactivate it with ‘credit = false’. But i will be glad if you let that small link where it is :D’
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</ul>
Look at <a href="http://www.free-qr-code.net/qr-code-wordpress-plugin.html" title="free-qr-code.net" rel="nofollow ugc">free-qr-code.net</a> for further information and for a easy useable qr code online generator.
Try out <a href="http://www.qrcode-generator.com" title="qrcode-generator" rel="nofollow ugc">qrcode-generator.com</a> for a QR Code Generator with free tracking and scan statistics.
<h3>Author</h3>
Rene Hermenau
“I create useful free microsites!” 
(http://www.free-qr-code.net “Free qr code online generator”)

QR Code Generator

QR Code Wordpress plugin to insert a QR code in your blog. The qr code contains the current URL or any other text you like.

API QRCode Generator vs QR Code Generator