Extensions
YouTube™ Sidebar
Easy Access to YouTube via Sidebar UI
Instagram Sidebar
Access to Instagram.
Google™ Translator Sidebar
Easy Access to Google Translate via Sidebar UI
Skype Sidebar
Access to Skype for Web on the sidebar.
2048 Sidebar
The famous 2048 game on the Opera Sidebar.
Classic Notes
Old-styled notes in your extensions sidebar. http://fidel.im/classic-notes?en
V7 Bookmarks
Bookmarks manager in your sidebar
Side Calculator
Calculator on the new sidebar of Opera.
Google Keep Sidebar
Access to Google Keep website on the sidebar.
Bookmarks by the Side
A simple bookmarks sidebar.
Twitter Lite Sidebar (Unofficial)
Access Twitter Lite through Opera Sidebar. This is an UNOFFICIAL extensions.
V7 Sessions
Sidebar session manager
SimpleExtManager
A simple menu to enable, disable and access options of extensions.
Pocket Sidebar
Pocket for Opera sidebar extention.
Vertical Tabs
Manage your tabs vertically in the sidebar!
Raindrop.io - Smart Bookmarks
"Save Button" for Web
Sidebar Sticky Note
Free HTML5 Sidebar Sticky Notes
V7 Notes
Old school opera notes
V7 History
Access History from your Sidebar
V7 Stash
save pages for later reading
Sidebar for Google™ Search
Easy Access to Google search via Sidebar UI
PageExpand
All Image Download. Image Zoom. Expand Thumbnail and Audio and Video. Expand the short URL. Override Referer. Extend BBS. etc...
TweetDeck Sidebar
Access to TweetDeck. For Opera 29+ only.
Quick Notes
The extension allows you to quickly save text notes on the sidebar of your browser.
V7 Tabs
Sidebar windows and tabs
V7 Extension Manager
simple extension manager for your side bar
Tree Tabs
Manage your tabs in the sidebar!
Web Panel
Navigate to websites in the sidebar.
Yandex.Translate Sidebar
This is an unoffical extensions. Yandex Translate for Opera Sidebar
Simple Bookmark Sidebar
This extension shows your bookmarks in Opera's sidebar.