Ant.com Antmarks Extension
Manage your favorite web pages
Remember, Bookmark and share your favorites links, Create your own web clippings , news, info , interests.. Discover what interest your friends.
Add to Delicious
Sidebar session manager
Navigate to websites in the sidebar.
Collect all your links in one place and share them
Add the best menu bar to get easy and fast access to all your useful browser options and internet products!
Icebergs Extension [unofficial]
Save anything from the Internet: Images, text, video, and websites. Ported from the Chrome Extension by Around Seven (so no, this is not an official version)
Provides facitility for landing info on the current page into Sheep Systems' BookMacster or Markster directly
Save favourite publications to your local browser storage.
Sidebar windows and tabs
Organize your work!
Open multiple websites with single click on toolbar icon
Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen
MovBoxx Opera Plugin
Collect all the videos, music & slides you love
OMG! Ubuntu! for Opera
The official OMG! Ubuntu! extension
The only browser history you will ever want to keep.
Save ad-free articles and web pages to your email inbox for later reading.
One click to share highlighting text, image or page by 80+ social services (space for 1.8 billion people)
All google web apps with a single click
GC Little Helper
Some little things to make life easy (on www.geocaching.com).
Shortcuts for Google™
Choose from 500+ Google™ shortcuts to show up as buttons in a space-saving popup
Evernote Web Clipper
Use the Evernote extension to save things you see on the web into your Evernote account.
Your Personal Search Engine