Tahir Yasin

This plugin adds a meta box to upload multiple images for posts and pages. You can enable it for custom post types also, please see installation instructions.
<h3>miu_get_images()</h3>
This function can be called from any template file to get attached images for the page/post being viewed. 
It returns an array of the attached image URL.
It take only one argument:
<ol>
<li>
post_id (integer) to get images linked to a specific post
 http://www.example.com/image-1.png 
 [1] => http://www.example.com/image-2.png 
)
?></li>
</ol>

Multi Image Upload

This plugin adds a meta box to upload multiple images for posts and pages.

looknear

Simple but powerful coupon generator. Use with caution. 
Creating multiple coupons with unique codes – from single source coupon. 
Easy solution and better results, while paying nothing! 
Was created because other similar alternatives – cost something. 
Feel free to donate anything between nothing to something 🙂
<h3>Why we need it?</h3>
In case you want to create the same coupon multiple times and to give multiple codes to your clients. 
This plugin will help you do it!

Coupon Bulker

This plugin does everything it promises, efficiently, and the prefix addition and bulk deletion options are nice to have. The interface could stand some work, and maybe the author will, over time, add new features - like coupon organization (categories and tags), and duplication of custom/3rd party coupon meta data, but this is a great start in any event.

Works well, no issues

Coupon generator : Duplicating a single source coupon multiple times & generate multiple codes. Download all codes in CSV format too.

Multi Image Upload vs Coupon Bulker