The Nodequeue module allows users to collect nodes in an arbitrarily ordered list. The order in the list can be used for a any purpose, such as:
A block listing teasers for the five top news stories on a site
A user’s favorite music albums
A group of favorite from which one is randomly displayed
Nodequeue provides a simple drag-and-drop interface to manually order any queue. Additionally, it allows nodes to be added and removed from queues without needing edit permissions to the node. Nodes can be added to queues either from a queue management tab or by links on the node teaser.
Drupal 8
The Entityqueue module is a rewrite of Nodequeue for Drupal 7 and Drupal 8, based on entities, and allows users to create queues of any entity type. If you need to migrate from Drupal 7 Nodequeue to Drupal 8 Entityqueue, you can use the Nodequeue migrate module.
Smartqueue API
Nodequeue provides a robust API that allows other modules to define smartqueues, which are associated with external data. For example, the included taxonomy smartqueue creates subqueues for a given queue for every term in the chosen vocabulary. Nodes are then only eligible for subqueues whose term matches the nodes terms. This makes it very easy to have queues for each category without cluttering the management page.
This is a Mime Mail component module (for use by other modules).
It permits users to receive HTML email and can be used by other modules. The mail functionality accepts an HTML message body, MIME-endcodes it and sends it.
If the HTML has embedded graphics, these graphics are MIME-encoded and included as a message attachment.
Adopts your site's style by automatically including your theme's stylesheet files in a themeable HTML message format.
If the recipient's preference is available and they prefer plaintext, the HTML will be converted to plain text and sent as-is. Otherwise, the email will be sent in themeable HTML with a plaintext alternative.
Allows you to theme messages with a specific mailkey.
Converts CSS styles into inline style attributes.
Provides simple system actions and Rules actions to send HTML email with embedded images and attachments.
Note that there are some serious limitations you need to take into consideration when creating email layouts, see the Email Standard Project for more information.