drupal token module
http://drupal.org/project/token 6.x-1.12 on 6.14
Main function:
It provides the ability to add short dynamic content to drupal core and module configurations. To some extent, these can then be utilised by administrators and end users.
Example function:
It can be used to insert current user name, a current title, a current description and, potentially, hundreds like these, with placeholders (= tokens). I use it to add "title", actually [title], functionality for the ed_readmore module, and it is a requirement for the ubercart module (among others).
The token module is used/required by quite a lot of other modules. It will be/is fully incorporated into D7.
Manage:
Nothing to manage. When only the main token module is enabled, there's no admin section. It shows itself in other modules that use it, like the ed_readmore module.
Example tokens are: [title], [author-name], [dd], [month], [year], [site-slogan], [user-name], and so on... The modules that use them should probably display a list of appropriate usable tokens (the ed readmore module does).