The gotwo.module adds the option to add redirected urls. It's much like the url alias system except that it uses redirects to go to the real url. All visits to the 'go' urls are tracked, so you can see how often a certain 'go' url has been visited. You can optionally force a disclaimer to be displayed before the user is redirected.
This module allows you to give a "moderate nodes" permission to a user role. Users with this permission may see a list of content (restricted using the node access table via db_rewrite_sql so they cannot see content they are normally prohibited) at /admin/content_moderator. Within this list they can either approve posts to move them out of moderation, or put them into moderation to remove them from public view (important note: only some modules, including book and poll, check the moderation status before displaying content).
For Drupal 6, this module has been incorporated into OG itself.
The og_actions module is a collection of 5 actions for use with the actions module and workflow module. These actions facilitate the use of organic groups with the actions and workflow modules, allowing administrators to create rules to modify the organic group information for specific nodes.
This module is intended to supply Drupal sites with an easy, non-intrusive mechanism for allowing visitors or registered users to suggest links to other sites.