Wysiwyg

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.

Focal Point

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

Region View Modes

"A surprisingly simple, flexible layout solution made possible by placing fields in regions. Region View Modes is just a bit of glue to join Drupal's theme regions and View Modes."

Picture

"The proposed HTML "picture" element (see responsiveimages.org, but has not been accepted for HTML 5) is implemented as a display formatter for image fields. This module is a backport of Drupal 8 picture module. This module will deliver alternate image sources based on device capabilities to prevent wasted bandwidth and optimize display for both screen and print. "

Image Style Quality

"Set JPG quality per image style
This module allows you to specify a custom quality on different image styles you create. After installing and enabling this module, you will have the option to add a new effect to your image styles, enabling you to change the quality."