"Defines a field type Block reference which allows the block to be displayed as the content of the field." Alternately, if the bean module is enabled, blocks can be referenced using the entity reference module instead.

This module provides site builders with a way of 'attaching' blocks within the content of any fieldable entity in Drupal. The same block is shown on any entity of that type/bundle.

Smart Trim implements a new field formatter for textfields (text, text_long, and text_with_summary, if you want to get technical) that improves upon the "Summary or Trimmed" formatter built into Drupal 7

The htmLawed module enables the use of the htmLawed(X)HTML filter/purifier with text/input formats.

This module lets you use very fine grained html filtering.

See /docs/common-htmlawed-settings for common settings.

Rabbit Hole is a module that adds the ability to control what should happen when an entity is being viewed at its own page.

Also see Internal Nodes

"Panels are great, but how do I change this one page?"

"A system for building "megamenu" -style (explanation) dropdown menus using Mini Panels, which provides tremendous flexibility in what can be displayed." Read documentation from Damien McKenna: https://drupal.org/node/1358006

Make all external links open in a new window. There are optional custom exclude/include filters.