Extension Manager

Various things to make admins' lives easier
Edit the alias list
Turns BBCode into HTML
Allows the site admin to configure the board to his or her taste
Allows the user to add a browser 'plugin' to search the site with real-time suggestions
Provides query and selection-based bulk action support
Bulk add server-side images
For stopping spam and other comment abuse
Allow Danbooru apps like Danbooru Uploader for Firefox to communicate with Shimmie
Add HTML to some space (News, Ads, etc)
Allow users to upload archives (zip, etc)
Handle CBZ Comic Archives.
Handle Flash files.
Handle windows icons
Handle MP3 files
Handle JPEG, PNG, GIF, WEBP, etc files
Handle static SVG files.
Provides documentation screens
Ban IP addresses
Allow users to make comments on images
Ban images based on their hash
Show a list of uploaded images
Allow users to score images
Allows users to see uploaded images
Show various forms of link to each image, for copy & paste
Provides common functions and settings used for media operations.
Redirect users to the rules if they use bad tags
Allow users to send messages to eachother
Turns BBCode into HTML
Self explanatory
Self explanatory
Regenerate a thumbnail image
Report images as dupes/illegal/etc
This extension allows admins to resize images.
A simple wiki, for those who don't want the hugeness of mediawiki
Provides system screen
Show various bits of system information
Allow images to have tags assigned to them
Keep a record of tag changes, and allows you to revert changes.
Show the tags in various ways
Shimmie updater! (Requires admin panel extension & transload engine (cURL/fopen/Wget))
Allows people to upload files to the website
Allows people to sign up to the website
Sitemap with caching & advanced priorities