Mga extension
Sidebar for Google™ Translate
Easy Access to Google Translate via Sidebar UI
Sidenotes
Simple notes for your Opera sidebar
Vertical Tabs
Manage your tabs in the sidebar!
Sudoku Sidebar
Play Sudoku on Sidebar anytime in your browser! even offline!
Web Panel
Navigate to websites in the sidebar.
Emoji Minesweeper
Play Minesweeper as Emojis!
Free File Sender
Free file transfer
Page Sidebar | Open any page in side panel
Effortlessly open any website in your web browser's sidebar – streamline your workflow instantly!
uMatrix
Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.
ChessGrow
Give easy access to ChessGrow from sidebar.
Simple Notes
Simple notes in a panel, with a context menu item to copy text to a note.
Sudoku v2
Play Sudoku from sidebar anytime even offline
PageExpand
All Image Download. Image Zoom. Expand Thumbnail and Audio and Video. Expand the short URL. Override Referer. Extend BBS. etc...
Bing Translate
Easily access Bing Translate from Opera's sidebar
Bookmarks Manager and Viewer
An elegant bookmark manager with fuzzy search and more
Category Tabs for Google Keep™
Better organize your Google Keep notes
Bible-WebApp
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
Shortcuts for Google™
Choose from 1000+ Google™ shortcuts to show up as buttons in a space-saving popup
Tree Tabs
Manage your tabs in the sidebar!
Morse Code Translator
Translate text to Morse code and back.
Bookmarks by the Side
A simple bookmarks sidebar.
calcatom
Smart scientific calculator with live currency conversion in your browser
Language toolkit
The missing language interface.
GTasks Sidebar
Google Tasks on sidebar (not official)
Tabsets.net
Use the tabsets.net browser extension to safely keep track all your tabs and links in the Side Panel, locally or in the cloud
TickTick for Opera Sidebar (Unofficial Extension)
TickTick for Opera Sidebar. Unofficial Extension
ICQ for Sidebar
Run ICQ Web in Sidebar
Fraction Generator
Generate Fractions for copy to clipboard
Simple Vertical Tabs
Simple Vertical Tabs
Browse++ Sidebar
Utilities for even more powerful web browsing. Search all open tabs, retrieve previously closed tabs, and make notes.
Black Menu for Wikipedia
Easy access to the Wikipedia universe
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.