This module provides an image formatter that allows you to set an image in the background of a div. The images are from a field of an entity and not from a configuration page or something else, so it's very easy to setup and manage.

https://www.drupal.org/project/bg_image_formatter

Background images is a collection of modules that allows users to add background images to html elements on pages of the site.

https://www.drupal.org/project/bg_image

BackgroundField started as an extension of the CCK ImageField that allows a CSS selector and background attributes to be set for a content-type. This is particularly helpful for allowing your node authors to add images to a node that are integrated into the theme of the site. With the inclusion of the Image field in Drupal 7, BackgroundField was rewritten to extend that core functionality.

https://www.drupal.org/project/backgroundfield

1. Install the module like normal.
1. More Info can be found here. https://www.drupal.org/docs/7/extend/installing-modules
2. By default the module reads from a CDN. If you would prefer a local copy of the script, install the libraries module, and download isotope.pkgd.min.js from http://isotope.metafizzy.co/ to /sites/all/libraries/isotope (or use drush make).

Global Vocabularies

You do this the same way you normally do in Drupal. Create Taxonomies and then add taxonomy reference fields to the content types. See the Drupal 7 documentation on taxonomies for more information.

The social feed field module makes it possible for editors to create a list of social media posts in a entity that are combined and ordered by created date from several different social media channels.

The module creates a new field type that site builders can add to entities.