Sambungan
Bookmarks Manager and Viewer
An elegant bookmark manager with fuzzy search and more
PageExpand
All Image Download. Image Zoom. Expand Thumbnail and Audio and Video. Expand the short URL. Override Referer. Extend BBS. etc...
Free File Sender
Free file transfer
Tab Sidebar
A sidebar extension for tab management.
TickTick for Opera Sidebar (Unofficial Extension)
TickTick for Opera Sidebar. Unofficial Extension
Bible-WebApp
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
ICQ for Sidebar
Run ICQ Web in Sidebar
Site Settings Sidebar
Site specific settings on your sidebar.
tabzen
Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen
MightyV Sidebar
Follow your favorite TV show. For Opera 29+ only.
Browse++ Sidebar
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.
Monthly Prayers Timetable
Islamic Monthly Prayers Timetable with HTML5 localStorage
GTasks Sidebar
Google Tasks on sidebar (not official)
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.
Hackernews Sidebar
Loads up Dharmesh Patels's excellent Web App for Hackernews on the Sidebar
KJMZ DA BLAZE
Listen KJMZ DA BLAZE Radio with Opera Browser.
TollSjekk
TollSjekk
InoReader Sidebar
Mobile version Inoreader.com on sidebar (not official)
TaggingNotes
Adds notes managed by tagging without hierarchized tree to sidebar.
Simple Vertical Tabs
Simple Vertical Tabs
Quick History Redux
A Redux (bug fix) for gucio1007's "Quick History". It shows your browsing history in the browser sidebar.
Techmeme 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.
The Stories (sidebar edition)
Smart and beautiful tool for keeping links. Create a story for every ocasion!
Blendup
A tool for web developers to preview blend modes on different page elements.