Integer is designed to work out-of-the-box and doesn’t require any plugins. However, with the plugins listed below, you can extend the functionality of the theme.
Jetpack — with Jetpack you can add Tiled Galleries, Carousel, Infinite Scroll, and use Content Options to hide or show post thumbnails and some other elements of the website. In order to use Jetpack, you’ll need to connect it to your WordPress.com account. Here is a step-by-step guide on how to do it.
Contact Form 7 — allows you to create contact forms that can be easily added to posts, pages, and widgets.
Pageviews — allows you to show the number of times users viewed your posts in a post meta section.
MailChimp for WordPress — is used to connect your website with MailChimp and add subscription forms to your website.
Regenerate Thumbnails — if you are switching from another theme, you’ll need to run this plugin once in order to make images look good.