Actively maintained

Flippy is an ultra-simple module that generates previous/next pagers for content types. On the Node type administration screen, you can turn Flippy on or off

It's often useful to provide two versions of a given string: one that's intended for human viewing and another that's intended for use in database queries, URLs, and so on.

In Drupal, this is generally known as a 'Name' and 'Machine name' pair. Drupal 7 even provides a prefab FormAPI element to simplify the process of entering these matched pairs.

Safeword exposes a custom FieldAPI field type that stores two strings using the name/machine name approach. It can be useful when generating PathAuto aliases, exposing Views arguments, and so on.

One common use is to not give users permission to 'Create and edit URL aliases' and instead give them access to a Safeword field which uses the node title as it's source. So that users can only edit a limited part of the path, keeping safe the other parts that your site features may rely on.

Provides a "boolean" field type with an additional state of "not set" in addition to the usual "true/false" or "on/off." A separate display string can be defined for each state.

Code per Node makes it possible to add custom CSS and Javascript per node, per content type, per block, and globally. The code is stored in the database, but served from the file system. It also supports syntax highlighting with CodeMirror.

CPN was covered by a recent webinar by Mediacurrent: http://www.mediacurrent.com/blog/webinar-code-node (this is also mentioned in DrupalEasy podcast 120)