Newsletter Glue is a WordPress plugin that allows you to write and send Newsletters with efficiency, both to e-mail subscribers and blog visitors. This means saving lots of time; according to them around 1-2 hours per newsletter, which will give you more time to polish your content or promote on social media. They offer template designs, subscriber form blocks, newsletter publishers and e-mail archives. Their website offers all the information needed in a simple and neat design; video demos, pricing tables, testimonials… subscribe to their newsletter and receive a 10% off discount.