Leudachain
uBlock Origin
Finally, an efficient blocker. Easy on CPU and memory.
Translator
Translate selected or entered text
Video Downloader VeeVee
Video Downloader VeeVee – download videos from the Internet.
Bitwarden - Free Password Manager
A secure and free password manager for all of your devices.
Sidebar for YouTube™
Easy Access to YouTube via Sidebar UI
Pacman
A Pacman game on a popup, now version 1.2!
Facebook Opera Sidebar
Access Facebook through Opera Sidebar.
GX Calculator
Simple GX-style calculator adapts to the current colors and also reacts to keystrokes.
Sidebar for Google™ Translate
Easy Access to Google Translate via Sidebar UI
Sidebar for YouTube™
Simple access to YouTube using the sidebar UI
Sidebar for Youtube Music
Youtube Music sidebar extension
Sidebar Sticky Note
Free HTML5 Sidebar Sticky Notes
Note Sidebar
Simple note sidebar which can be used to write a note, record thoughts, to-do list, meeting notes, etc.
QR Code Generator
Generate any QR code anytime, even offline
Sidebar Sketch
Sketch anytime on your sidebar, even offline.
Text to Voice
Open sidebar selected text and click in context menu 'Selected text to Speech' to listen
Emoji Minesweeper
Play Minesweeper as Emojis!
Sudoku Sidebar
Play Sudoku on Sidebar anytime in your browser! even offline!
Sidenotes
Simple notes for your Opera sidebar
Vertical Tabs
Manage your tabs in the sidebar!
Bing Translate
Easily access Bing Translate from Opera's sidebar
Quick Notes
The extension allows you to quickly save text notes on the sidebar of your browser.
Web Panel
Navigate to websites in the sidebar.
Twitter Lite Sidebar (Unofficial)
Access Twitter Lite through Opera Sidebar. This is an UNOFFICIAL extensions.
Sudoku v2
Play Sudoku from sidebar anytime even offline
Simple Notes
Simple notes in a panel, with a context menu item to copy text to a note.
Google Messages for Opera Sidebar
This Add-On allows you to send text messages from your Opera Browser, to anyone you want.
Tree Tabs
Manage your tabs in the sidebar!
Google Messages Sidebar
Access to Google Messages website on the sidebar.
Bible-WebApp
This widget uses Logos Bible Software's Biblia.com Bible API service to get the Bible text
Bookmarks Manager and Viewer
An elegant bookmark manager with fuzzy search and more
uMatrix
Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.