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