"An add-on for Advanced CSS/JS Aggregator to allow search & replace actions on the CSS or JS being loaded, i.e. a lightweight preprocessor."

This module "allows permissions to be set to each field within the Authoring information and Publishing options field sets on the node form. It also allows selected field sets to be set as collapsed and / or collapsible."

"The Custom Contextual Links module allows you to add your own links to the contextual drop down widgets of blocks and nodes."

"This module allows fine-grained access control of user administrators, by providing various editing protection for users. The protections can be specific to a user, or applied to all users in a role."

Download over 3.5 million times, this module is an insane query builder. Learn it.

"Import or aggregate data as nodes, users, taxonomy terms or simple database records."

The best reference module for Drupal. This is supposed to be in core for Drupal 8.

By using the version of Geshi found at https://github.com/easybook/geshi , Sass and Twig syntax highlighting can be added to text fields in Drupal.

Here's a nice way to create color maps for your theme in SASS.

Similar to Features and CINC, "The configuration management module enables the ability to keep track of specific configurations on a Drupal site, provides the ability to move these configurations between different environments (local, dev, qa, prod), and also move configurations between completely different sites (migrate configurations) without the use of modules with all configuration being owned by the site."