Flag is a flexible flagging system that is completely customizable by the administrator. Using this module, the site administrator can provide any number of flags for nodes, comments, or users. Some possibilities include bookmarks, marking important, friends, or flag as offensive. With extensive views integration, you can create custom lists of popular content or keep tabs on important content.

This module builds user profiles as content (aka nodes), which opens the opportunity to use all the powerful modules for content for user profiles too, e.g. the Content Construction Kit (CCK). It's intended to be simple and useful, but extensible by further modules.

Content profiles can be restricted to certain roles; the module also supports separate content profiles for different roles.

#D7CX: I pledge that rules will have a full Drupal 7 release on the day that Drupal 7 is released.

The rules modules allows site administrators to define conditionally executed actions based on occurring events (known as reactive or ECA rules). It's a replacement with more features for the trigger module in core and the successor of the workflow-ng module.

This module augments Views by allowing bulk operations to be executed on the nodes displayed by a view. It does so by showing a checkbox in front of each node, and adding a select box containing operations that can be applied on the selected nodes.

Yet another node access module.

This module allows you to manage permissions for content types by role and author. It allows you to specifiy custom view, edit and delete permissions for each content type. Optionally you can enable per content access settings, so you can customize the access for each content node.

In particular:

This module provides API integration with the Twitter microblogging service and API-compatible alternatives like Identi.ca. Out of the box, it allow users to:

The Token module is a key component for some modules and allows for smaller bits of information to be passed between modules with placeholders. This allows for the information to be placed into larger documents dynamically. Token module is part of Drupal 7 core!

Tokens are small bits of text that can be placed into larger documents via simple placeholders, like %site-name or [user]. The Token module provides a central API for modules to use these tokens, and expose their own token values.