Linksicle is a free program that allows you to explore the Web without leaving the page you're on. The program allows you to connect to relevant information faster, it has support for searching and translating information and it allows you to highlight any word or phrase, showing the Wikipedia and Bing results in an in-page window.
The WOT add-on is a crowd-sourced enhancement to your browser protection
It is a browser add-on which lets you search via your favorite search engine
