The Old Reader add feed extension
Add to Delicious
Adds a QR code to every listing page.
A search engine made by the people, for the people
Search in YouTube
Right-click on some selected text and find results in Youtube
The best clock to see in one glance the current date and time. With an option to see the digital clock in the browser toolbar.
Merge all browser windows in one
betterBrowser- Browse 15% faster
betterBrowser - Browse faster. Improve your Google search experience.
Search within the site
This extension let you search on site with Google or Yandex search
The world's most popular userscript manager
Right-click on some text and find its image with Google image search.
Gismeteo Weather Forecast. Real time weather and detailed forecast all round the world
Styles and skins for all popular sites in the web
Notification for new RSS feed posts. No account required.
Nimbus Screen Capture
Screen Capture FULL Web page or any part. Edit screenshots. Record screencasts - record video from your screen.
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
AutoPagerize load next page automatically in many web sites.
Search similar image by "Google search by Image".
Filter request headers
Block certain values (cookies, etc.) from http request headers.
The Old Reader extension
This extension provides a toolbar icon to notify you about unread items in your The Old Reader account.
IPv4 to IPv6 Converter
Convert Internet Protocol v4 (IPv4) address to Internet Protocol v6 (IPv6) address using different methods.
UzHack - ответы к UzTest
Base64 Encode and Decode
Quickly Encode & Decode Base64 strings
The Old Reader Notifier
Notifies you about unread items in your The Old Reader account.
Open in (background) tab
Extends the context menu of selected text to open an URL in a new tab.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Quickly view the HTTP headers of the current tab.
This extension lets you easy find the most common Opera actions.