Chrome browser which is based on open source Chromium browser, where the new features first lands on this build, there after in canary then Dev., Beta and stable versions of Chrome follows. You must agree with me that downloading Chromium is tough task as you can’t even find the official Chromium download link on Google. Your chaos now over, Francois Beaufort developed a web app which eases the process of Chromium download.
Downloading Chromium was never this easy
Just visit http://download-chromium.appspot.com/(update: now maintained by Chromium team) in any browser and download Chromium zip file, extract contents from zip file to a folder and run Chrome icon to launch Chromium.
This web app is powered Google App engine.
If you’re curious to know the old way to download Chromium build, you can be find it here. You should know Chromium won’t auto updates it self.