Opera is a web browser first publicly released by the Norwegian company Opera Software in 1996. It is available for many types of computer operating systems including Windows, Mac OS X and Linux.

Although not very common on desktop and laptop computers, it is very popular on mobile phones and PDAs as well as being the web browser for the Nintendo DS (a mobile games device) and the Nintendo Wii (a home games device).

Firefox is the name of a web browser created by the Mozilla Foundation. Web browsers are software programmes that we use to view web pages.

At present, Firefox is the second most popular web browser after Microsoft's Internet Explorer.

Like almost all web browsers, Firefox is free to download and use.

Camino is a web browser which is only available for Apple Mac. It is open source and is created by the Mozilla Foundation.