Administration Menu – 6.x: Renders a menu tree for administrative purposes as dropdown menu at the top of the window.
Content 6.x: Allows administrators to define new content types.
Content Copy 6.x: Enables ability to import/export field definitions.
Embedded Media Field 6.x: Provides an engine for modules to integrate various 3rd party content providers, such as Video Neighborhood, Image Neighborhood, and Audio Neighborhood.
Embedded Video Field 6.x: Defines a field type for displaying third party videos, such as YouTube and Google Video.
Fieldgroup 6.x: Create field groups for CCK fields.
Node Reference 6.x: Defines a field type for referencing one node from another.
Number 6.x: Defines numeric field types.
Option Widgets 6.x: Defines selection, check box and radio button widgets for text and numeric fields.
Text 6.x: Defines simple text field types.
User Reference 6.x: Defines a field type for referencing a user from a node.
Blog 6.x: Enables keeping easily and regularly updated user web pages or blogs.
Color 6.x: Allows the user to change the color scheme of certain themes.
Contact 6.x: Enables the use of both personal and site-wide contact forms.
Database logging 6.x: Logs and records system events to the database.
Forum 6.x: Enables threaded discussions about general topics.
Help 6.x: Manages the display of online help.
Menu 6.x: Allows administrators to customize the site navigation menu.
Path 6.x: Allows users to rename URLs.
Ping 6.x: Alerts other sites when your site has been updated.
Profile 6.x: Supports configurable user profiles.
Search 6.x: Enables site-wide keyword searching.
Taxonomy 6.x: Enables the categorization of content.
Tracker 6.x: Enables tracking of recent posts for users.
Upload 6.x: Allows users to upload and attach files to content.
Event 6.x: Calendaring API, calendar display and export
Image 6.x: Allows uploading, resizing and viewing of images.
Image Attach 6.x: Allows easy attaching of image nodes to other content types.
Image Gallery 6.x: Allows sorting and displaying of image galleries based on categories.
Image Import 6.x: Allows batches of images to be imported from a directory on the server.
ImageAPI: ImageAPI supporting multiple toolkits.
ImageCache 6.x: Dynamic image manipulator and cache.
Imagecache UI 6.x: ImageCache User Interface.
IMCE 6.x: An image/file uploader and browser supporting personal directories and user quota.
Menu breadcrumb 6.x: Allows you to use the menu the current page belongs to for the breadcrumb.
Meta tags 6.x: Allows users to add meta tags, eg keywords or description.
Nice Menus 6.x: CSS/jQuery drop-down, drop-right and drop-left menus to be placed in blocks
Pathauto 6.x: Provides a mechanism for modules to automatically generate aliases for the content they manage.
Poormanscron 6.x: Internal scheduler for users without a cron application.
Site map 6.x: Display a site map.
TinyMCE 6.x: The most popular WYSIWYG editor for advanced content editing.
Token 6.x: Provides a shared API for replacement of textual placeholders with actual data.
Views 6.x: Create customized lists and queries from your database.
Custom 6.x: Controls the boxes that are displayed around the main content.