Google, the internet search God, will release it’s open source browser today. Chrome, is free and currently Windows capable. (Mac version is still in the works)
You can take a look at it here http://gears.google.com/chrome/?hl=en
From Goggle’s Why we built a new browser– "On the surface, we designed a browser window that is streamlined and simple. To most people, it isn’t the browser that matters. It’s only a tool to run the important stuff – the pages, sites and applications that make up the web. Like the classic Google homepage, Google Chrome is clean and fast. It gets out of your way and gets you where you want to go.
Under the hood, we were able to build the foundation of a browser that runs today’s complex web applications much better . By keeping each tab in an isolated "sandbox", we were able to prevent one tab from crashing another and provide improved protection from rogue sites. We improved speed and responsiveness across the board. We also built V8, a more powerful JavaScript engine, to power the next generation of web applications that aren’t even possible in today’s browsers."
You can download CHROME right now and try it out for yourself