Brad Griffin

This plugin allows you to add custom text to the WooCommerce “Add to Cart” button. When editing a product, there will be a new field that allows to you customize the button text for that particular product.
<h4>Contributions</h4>
If you’re interested in contributing to this plugin – you can head over to the <a href="https://github.com/BurlesonBrad/Custom-WooCommerce-Add-to-Cart" rel="nofollow ugc">GitHub Repository</a>.

Custom WooCommerce Add to Cart

Customize the WooCommerce "Add to Cart" button text on a per-product basis.

NsThemes

This plugin allow you to change add to cart button text. 
Page option will appear in your WordPress backend menu, and here you can add your text button. 
You only have to digit your text and save it! New button text will appear in shop page and single product page. 
New button text will added in your woocommerce, in a very clean and simple mode.
PREMIUM FEATURES of custom add to cart button:
You can add different button text for any product. 
You can add different button text for any category. 
Custom style for any button.
For more information about PREMIUM VERSION, visit official page <a href="http://www.nsthemes.com/" rel="nofollow ugc">NsThemes Marketplace</a>.
We test our plugins with many other. If you find incompatibility with one specific plugin, please inform us at <a href="mailto:report@nsthemes.com" rel="nofollow ugc">report@nsthemes.com</a>.

NS Custom Add To Cart Button For Woocommerce

This plugin help to change add to cart button text with no code required!

Custom WooCommerce Add to Cart vs NS Custom Add To Cart Button For Woocommerce