Tab to Window
Pull out current tab to a new window
Homepage in New Tab
This extension enables you to set homepage and open in new or current tab.
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)
RSS Reader for Opera 15+!
RSS Detector for Smart RSS extension.
Awesome Screenshot: Capture & Annotate
Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. Support PNG and shortcuts.
The easiest way to access different search engines.
Diigo Web Collector - Capture and Annotate
Bookmark, Archive, Screenshot & Markup - All-In-One Web Collector, must-have research tool
Custom menu allows the user to create a menu to access various network resources.
Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.
YouTube HTML5 unblocker
View any YouTube video in HTML5, even those that require flash!
All your favorite radio stations in one extension.
Listen your favorite Internet radio station!
1800PocketPC News Stream straight from your Opera toolbar.
Displays a flattr button in the browser address bar.
The missing bookmark manager for hte Opera Browser
Browser clock will show time on the extension's toolbar, click on the badge to bring up the large clock panel to view the local time and date.
Convert among Celsius, Fahrenheit, Kelvin, Rankine & Reamur. Create direct link to any of your conversions
Detect humans.txt for the current web and show the content. (What is humans.txt? http://humanstxt.org)
Local pass store
A password manager with local storage, a bit like old WAND.
Shows you what kind of link you are going to click on.
Translate, learn and train words from foreign languages
Outlook.com Speed Dial
Outlook.com Speed Dial extension shows you if you have new messages when you're logged in. Based on stormbreakerbg's Speed Dial for Gmail (http://bit.ly/1dVLC2R) and tombb's Outlook.com Notifier (http://bit.ly/17qEZ3D).
Comprehensive site information and phishing protection when browsing the web
Switch tabs easily with keyboard
Removes garbage like "utm_source" from URLs
Your public IP address and other tracking info
Special window, which appears on selecting a text, with helpfull icons for searching, translating and more!
Track news about Edward Snowdon (or anything you like) w/o refreshing!
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.