Name	Docs	Description
Admin
Holiday Theme		Use an additional stylesheet on certain holidays
Tag Tools		Recount / Rename / Etc
Feature
Post Comments		Allow users to make comments on images
Post List		Show a list of uploaded posts
Wiki		A simple wiki, for those who don't want the hugeness of mediawiki
File Handling
Bulk Download		Allows bulk downloading images.
Handle Pixel		Handle JPEG, PNG, GIF, and similar files
Handle Video		Handle FLV, MP4, OGV and WEBM video files.
Regen Thumb		Regenerate a thumbnail image
Replace File		Allows people to replace files for existing posts
General
Alias Editor		Edit the alias list
Autocomplete		Adds autocomplete to search & tagging.
BBCode		Turns BBCode into HTML
Common Elements		Renders common elements (thumbnails, paginators) in a way that themes can override
Emoticon Filter		Lets users use graphical smilies
Featured Post		Bring a specific image to the users' attentions
Filter Tags		Allow users to filter out tags.
Link to Post		Show various forms of link to each image, for copy & paste
Post Peek		Peek at posts
Random Post		Do things with a random post
System Info		Show various bits of system information
Integration
Reverse Search Links		Provides reverse search links for images.
Metadata
Auto-Tagger		Provides several automatic tagging functions
Lock Editor		Allow images to have metadata locked
Notes		Annotate images
Owner Editor		Allow images to have owners assigned to them
Source Editor		Allow images to have sources assigned to them
Tag Categories		Let tags be split into 'categories', like Danbooru's tagging
Tag Editor		Allow images to have tags assigned to them
Moderation
Approval		Adds an approval step to the upload/import process.
Bulk Actions		Provides query and selection-based bulk action support
IP Ban		Ban IP addresses
Not A Tag		Redirect users to the rules if they use bad tags
Post Hash Ban		Ban images based on their hash
Report Posts		Report posts as dupes/illegal/etc
Source History		Keep a record of source changes, and allows you to revert changes.
Tag History		Keep a record of tag changes, and allows you to revert changes.
Trash		Provides "Trash" or "Recycle Bin"-type functionality, storing deleted images for later recovery
Word Ban		For stopping spam and other abuse in comments, tags and sources
Word Filter		Simple search and replace