Opera is a cross-platform web browser and Internet suite which handles common internet-related tasks including visiting web sites, sending and receiving e-mail messages, managing contacts, chatting online and displaying Widgets.

Widgets are small Web applications (multimedia, newsfeeds, games and more) that make your desktop experience more fun. Use the Widgets menu in Opera to discover new widgets and access your favorites.

Here is a list with the top 10 useful Opera widgets:

Torrent PowerSearch
Search all your favorite torrent sites... at the same time! It will display search results in tabs simultaneously for all sites you have selected, with information about name, download link, size, seeders, and leechers.

Artist's Sketchbook
This is an advanced painting widget with many tools: pencils, charcoal, paint brushes, calligraphy pen and more. It has also multilanguage support - at this moment 24 languages are included!

Scientific Calculator
With a dedicated line for the equation and another for the result, complex equations can be written with ease. Numbers and
simple functions can be input via the keyboard, while more advanced functions are available using the normal calculator buttons. If you don't like the default look, you can change it! Five different skins are provided.

VideoDownloader
Video Downloader allows you to download videos directly from most video sites. (Google Video, Putfile, YouTube... etc). This widget is based on videodownloader.net engine.

dotoo: To-do lists
Simple Widget that helps you keep an eye on things that need to be done.

The Colours Of The Rainbow
A colour picker which allows selecting colours from either the RGB or HSV colour spaces.

HTML Post
Write messages in blogs or forums, where use of HTML tags is allowed.

Screen Ruler
A virtual ruler useful for web designers and maybe for others too.

Quick PDF
With this widget you cand easily create PDF documents. Just type some text, click EXPORT and there you have it.

Page Rank
A simple way to check how high a website is ranked by Google PageRank. PageRank is used by Google to computer how high the
page will be shown in Google Search results.