In case you´ve been living under a rock lately, Opera recently announced that as of version 8.5, they will no longer be charging for usage of their browser.

In the past, previous versions were free for download. However, unless you paid for it, you were greeted by a built-in banner advertisement during the entirety of your web browsing. I had given it a try a few years ago, but simply had not found anything useful enough to merit either paying for it, or tolerating the ads. So, I switched back to Internet Explorer (pre-Firefox).