Browse Happy is a great resource providing information on various top web browsers.
Firefox is a free open-source browser built for speed and security. It's easy to install and a vast repository of extensions is available that will add extra functionality to the browser
Read more about Mozilla Firefox at BrowseHappy
As well as being a web browser, Mozilla Suite comes installed with an e-mail program, chat client and web page editor!
Read more about Mozilla Suite at BrowseHappy
Named the best web browser of 2004, Opera is fast and can be easily customised to suit your browsing requirements. It also comes with a powerful e-mail program.
Read more about Opera at BrowseHappy
Safari , the Mac browser is a slick little browser that comes with all the usual features. Tabbed browsing, popup blocking etc. Despite only running on OS 10.2 or higher it is very secure and reliable.
Read more about Safari at BrowseHappy
There is much talk recently about Internet Explorer's insecurities so may also be interested in the article Why is Internet Explorer unsafe?