All Image Download. Image Zoom. Expand Thumbnail and Audio and Video. Expand the short URL. Override Referer. Extend BBS. etc...
Opens Todoist(https://todoist.com) in the sidebar. This is an unoffical extension.
Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen
ICQ for Sidebar
Run ICQ Web in Sidebar
Sidebar for Google™ Search
Easy Access to Google search via Sidebar UI
Simple notes in a panel, with a context menu item to copy text to a note.
The extension allows you to listen GIKRadio directly in the browser. Walk on the Internet and listen good music! Request Song from sidebar (press CTRL+SHIFT+S).
Free File Sender
Free file transfer
A sidebar extension for tab management.
The best way to share things well surfing the web - Simplest possible way.
2048 Mini game
The game 2048
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
The History Panel
An extension that puts the browser history in the sidebar, sorted by date.
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.
Prayer times | مواقيت الصلاة.
معرفة مواقيت الصلاة
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.
Follow your favorite TV show. For Opera 29+ only.
Monthly Prayers Timetable
Islamic Monthly Prayers Timetable with HTML5 localStorage
Simple Vertical Tabs
Simple Vertical Tabs
How to get to Heaven
Find out how to get to heaven.
Loads up Dharmesh Patels's excellent Web App for Hackernews on the Sidebar
Minimalistic todo extension for your sidebar
Site Settings Sidebar
Site specific settings on your sidebar.
Mobile version Inoreader.com on sidebar (not official)
The Stories (sidebar edition)
Smart and beautiful tool for keeping links. Create a story for every ocasion!
The sidebar with all the Radioigor and Videoigor music channels.
Adds notes managed by tagging without hierarchized tree to sidebar.
Google Tasks on sidebar (not official)
Help on Social (#gHelp) Sidebar
Access to Help on Social (#gHelp) on the sidebar.