Chromeupdater is a project mainly written in RUBY and OBJECTIVE-C, it's free.
ChromeUpdater written in MacRuby
I like Chrome. Chrome on OSX is slowly updated. Chromium is nightly updated. I'm lazy. I wrote an app to do it for me.
This is a really beginner experiment in MacRuby. Please don't judge me (or at least do it politely and tell me where my code is awful).