Magestore -
Product Labels v1.0 released!
Magento Product Labels extension improves your conversion rate by 55% by creating and managing labels for a series of products simultaneously with just a few steps:

Specify condition (new, on-sale or custom) to apply labels
Utilize special variables to include in label texts such as discount amount, regular price, special price and so on.
Can separate Catalog and Product Detail labels setup
Prioritize labels.

Take a look at full features HERE