jamiechong

When a WooCommerce product is on sale, a tag is placed on top of the Product Thumbnails. The default label for this tag is “Sale!”. 
This plugin allows you to customize the label and can even insert the price difference or percent difference. Examples:
<ul>
<li>Save 20%</li>
<li>20% off!</li>
<li>Save $5.00</li>
<li>$5.00 off!</li>
</ul>

Woocommerce Custom Sale Tag

Customize the sale tag that appears on WooCommerce product thumbnails when a product sale price is set lower than the retail price.

Rami Yushuvaev

Maor Chasen

GenerateWP

This simple, but useful plugin that lets you control what label shows next to each Widget in your WordPress dashboard. The idea behind is to allow better organization of your widgets, as well as to give you a bit more control and flexibility over this already-built-in WordPress feature.
It’s very handy in cases where you’d like your clients to know something before updating a certain widget. We might even change this up in the future and change it up to a <code><textarea></code> field.
In the meanwhile — enjoy, and feel free to contribute / send pull requests our way <a href="https://github.com/maor/wp-widget-labels" rel="nofollow ugc">over at GitHub</a>.

Widget Labels

Allows you to use custom labels/titles for any of your Widgets

Woocommerce Custom Sale Tag vs Widget Labels