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