Opens Todoist(https://todoist.com) in the sidebar. This is an unoffical extension.
Manage your tabs in the sidebar!
Bookmarks Manager and Viewer
An elegant bookmark manager with fuzzy search and more
Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen
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).
A sidebar extension for tab management.
Site Settings Sidebar
Site specific settings on your sidebar.
ICQ for Sidebar
Run ICQ Web in Sidebar
Prayer times | مواقيت الصلاة.
معرفة مواقيت الصلاة
Simple notes in a panel, with a context menu item to copy text to a note.
2048 Mini game
The game 2048
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
The best way to share things well surfing the web - Simplest possible way.
The History Panel
An extension that puts the browser history in the sidebar, sorted by date.
Free File Sender
Free file transfer
Minimalistic todo extension for your sidebar
Google Tasks on sidebar (not official)
Simple Vertical Tabs
Simple Vertical Tabs
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.
Monthly Prayers Timetable
Islamic Monthly Prayers Timetable with HTML5 localStorage
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.
Mobile version Inoreader.com on sidebar (not official)
The sidebar with all the Radioigor and Videoigor music channels.
Adds notes managed by tagging without hierarchized tree to sidebar.
The Stories (sidebar edition)
Smart and beautiful tool for keeping links. Create a story for every ocasion!
Loads up Dharmesh Patels's excellent Web App for Hackernews on the Sidebar
Follow your favorite TV show. For Opera 29+ only.
A tool for web developers to preview blend modes on different page elements.
Help on Social (#gHelp) Sidebar
Access to Help on Social (#gHelp) on the sidebar.