The WYSIWYG module is my favorite for rich text editing in Drupal 6 and Drupal 7. (In Drupal 8, WYSIWYG is in core.) Here's how I set it up.

Not a lot of time to document this, tight schedule today, but I wanted to make sure this code didn't slip through the cracks.

For Drupal 8, adds the ability to add CSS classes to link fields.

Provides some advanced layout and display options for content. "Display Suite is a module that takes over the rendering of entities."

This module adds a view mode selector field to any entity

This Drupal 8 module allows to restrict text formats on fields.

Allows for quick editing of field type panel panes.

Lets you do cropping of images. Works with the picture module.

Sponsored by NBCUniversal, the focal point module seems to have been inspired by the image field focus module

Crop, rotate, resize images with CKEditor and the Media module.