एक्सटेंशन
PageExpand
All Image Download. Image Zoom. Expand Thumbnail and Audio and Video. Expand the short URL. Override Referer. Extend BBS. etc...
Todoist sidebar(Unofficial)
Opens Todoist(https://todoist.com) in the sidebar. This is an unoffical extension.
Sidebar for Google™ Search
Easy Access to Google search via Sidebar UI
tabzen
Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen
Simple Notes
Simple notes in a panel, with a context menu item to copy text to a note.
Tab Sidebar
A sidebar extension for tab management.
Site Settings Sidebar
Site specific settings on your sidebar.
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.
2048 Mini game
The game 2048
Side Chat.
The best way to share things well surfing the web - Simplest possible way.
GIKRadio
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).
ICQ for Sidebar
Run ICQ Web in Sidebar
Bible-WebApp
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
Free File Sender
Free file transfer
Prayer times | مواقيت الصلاة.
معرفة مواقيت الصلاة
Hackernews Sidebar
Loads up Dharmesh Patels's excellent Web App for Hackernews on the Sidebar
Sidebar Todo
Minimalistic todo extension for your sidebar
Browse++ Sidebar
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.
Goldfishka
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
Radioigor side
The sidebar with all the Radioigor and Videoigor music channels.
Simple Vertical Tabs
Simple Vertical Tabs
InoReader Sidebar
Mobile version Inoreader.com on sidebar (not official)
TollSjekk
TollSjekk
Techmeme Sidebar
Browse technology news on Techmeme in the sidebar.
TaggingNotes
Adds notes managed by tagging without hierarchized tree to sidebar.
GTasks Sidebar
Google Tasks on sidebar (not official)
MightyV Sidebar
Follow your favorite TV show. For Opera 29+ only.
Blendup
A tool for web developers to preview blend modes on different page elements.
The Stories (sidebar edition)
Smart and beautiful tool for keeping links. Create a story for every ocasion!