Saft is a Safari plugin to extend its features with sidebar, searchable history and bookmarks, full-screen browsing, type-ahead searching, customized Google Search field, URL shortcuts and kiosk mode. Features include (strikethrough features are implemented in Safari now):
Ad/banner blocking with simple URL pattern matching
Add bookmark folder here and add bookmark here in every bookmark menus
Add title, timestamp, URL and page number when printing
Always open browser window in tab
Auto hide Downloads window
Auto save and restore opened browser windows at quitting and start
Back/Forward in contextual menu
Block animation
Block HTML refreshing in front-most browser
Block images and plugins
Bookmark search
Bookmark this group of tabs
Consolidate browser windows
Control-1 to 9 to popup bookmark menu or open bookmark
Control-drag page
Crash protection
Customizable HTTP timeout
Customized Google search field
Do not allow scripts to bring tab to front
Drag tab buttons to add the URL string to other applications
Enter/ctrl-enter to go to next/previous links (like in Google)
Export Selected Bookmarks
Extended search from contextual menu
External text editor support for TextArea
Focus the last selected tab when closing the current one
Full-screen browsing
Growl support
History search
Install debug menu
Kiosk mode
Max screen for normal browser windows
One-page PDF export
Open tab in new window
Option to use Aqua interface
Original URLs in Finder comments of downloaded files, exported PDFs and saved pages
Save and load browser windows
Separator in bookmark menu
Sidebar
Sort bookmarks in every bookmark menus
Stop download warnings
Tab rearranging with drag and drop
Type-ahead searching
Undo support for closing tab
Undo support in HTML TextArea and TextField
URL shortcuts
URL traverse with return-key
Work-around of click-through bug in WebKit