JC Coupon Lite plugin provides easy to use coupon management to be included in your posts and pages or even in side bars. There are heaps of options t
JC Coupon is a WordPress Coupon Plugin which Allows You To Add Coupons on any post or page. You can set expiry date or custom text for expiry. Coupons when pass their expiry date will not show up. You can use shortcodes on pages and posts
When you set coupon with no expiry date they will appear indefinetly
This is must have affiliate tool where your URLs are masked and a click on your coupon will mean a hit to your your affiliate link.
visit http://jaspreetchahal.org/wordpress-jc-coupon-plugin-lite/ for help.