Opens Todoist(https://todoist.com) in the sidebar. This is an unoffical extension.
All Image Download. Image Zoom. Expand Thumbnail and Audio and Video. Expand the short URL. Override Referer. Extend BBS. etc...
Bookmarks Manager and Viewer
An elegant bookmark manager with fuzzy search and more
A sidebar extension for tab management.
Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen
The best way to share things well surfing the web - Simplest possible way.
Site Settings Sidebar
Site specific settings on your sidebar.
Simple notes in a panel, with a context menu item to copy text to a note.
2048 Mini game
The game 2048
ICQ for Sidebar
Run ICQ Web in Sidebar
Prayer times | مواقيت الصلاة.
معرفة مواقيت الصلاة
Free File Sender
Free file transfer
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).
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.
Simple Vertical Tabs
Simple Vertical Tabs
Mobile version Inoreader.com on sidebar (not official)
Minimalistic todo extension for your sidebar
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.
The sidebar with all the Radioigor and Videoigor music channels.
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
Monthly Prayers Timetable
Islamic Monthly Prayers Timetable with HTML5 localStorage
Google Tasks on sidebar (not official)
Follow your favorite TV show. For Opera 29+ only.
The History Panel
An extension that puts the browser history in the sidebar, sorted by date.
Browse technology news on Techmeme in the sidebar.
Loads up Dharmesh Patels's excellent Web App for Hackernews on the Sidebar
How to get to Heaven
Find out how to get to heaven.
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!