The headings plugin allows you to set larger headings on a pad which makes it possible to have different font sizes.
The Page view plugin allows a page view style UI for Etherpad
This plugin adds social network links to your share popup
This plugin embeds a drawing / sketching panel for sharing doodles and illustrations
Easily see and search through the pads on your installation
Search through an entire documents history to realize when a word was added/removed.
See the line by line difference between two revisions of a document
Offline Pad Access
Still be able to access your pads if you are disconnected from the internet
Public view and List Pads
Public view allows for pads to be indexed by search engines and access without the additional overhead of the editor.