WOT for Opera
Opera is a web browser and Internet suite developed by Opera Software. The browser handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, chatting on IRC, downloading files via BitTorrent, and reading Web feeds. Opera is offered free of charge for personal computers and mobile phones. 
What is it, and how can you install it ?
You can also use it through GreaseMonkey for Firefox or GreaseKit for Safari.
What does it do ?
This script adds WOT bubbles before each links on search engine results page. These bubbles go green (safe) to red (dangerous). To see details, you just need to click on one of them.
You also can rate a link. To do so, open details of a link, and click on the rating button. A popup will show up so that you can log in, and rate the website.
Supported search engines and websites
A supported search engine or website means you'll see WOT bubbles before each link of the page.
- Bing images
- Good Tree
- Google images
- Google (secured)
- Green Maven
- Le Moteur
- Secret Search Engine Labs
- Yahoo Images