"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."

CKEditor is new favorite rich text editor however I prefer to use the WYSIWYG module because it seems to have better media module support. This module, however, is needed if you plan to use the Scald module. If unsure, then I suggest using the WYSIWYG module instead.

Maintained by Dave Reid, Earl Miles, Damien McKenna and Derek Wright

With the Field Conditional State module you can change the state of any supported fields form element depending on the content of other fields. This is done by providing an UI for Drupal's States API. All the changes made to a form by FCS (Field Conditional States) utilize only the States API and therefore are clientside only.

This module lets you take the input from a field and allows using HTML and token replacement (or alternately PHP) for display.

This is the module that is used on this site for code highlighting.

A nice way to add placeholders to input fields. "This module auto-converts form input fields with space-hogging labels into compact mobile-friendly input fields, with placeholders that animate into much smaller labels the moment text is keyed in. "

The gist: "This module extends the functionality of the core 'file' field, adding new capabilities to the file upload widget, and providing a new extendible field formatter for displaying lists of files."