What downloadable software projects use "Continuous Roll-Out"?
"Continuous Integration" is not only used by many large scale websites like Google, Amazon and Facebook. Many developers of downloadable software also use it internally during the development process. But for delivery to their customers they still use "version steps".

Google Chrome shows us today how "continuous roll-out" can work for a downloadable software: The user doesn't even notice when a new version is installed and it is done all the time.

My question is: What other software projects (not SaaS services) use continuous roll-out for their software-distribution?
What downloadable software projects use "Continuous Roll-Out"?
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"Continuous Integration" is not only used by many large scale websites like Google, Amazon and Facebook. Many developers of downloadable software also use it internally during the development process. But for delivery to their customers they still use "version steps".

Google Chrome shows us today how "continuous roll-out" can work for a downloadable software: The user doesn't even notice when a new version is installed and it is done all the time.

My question is: What other software projects (not SaaS services) use continuous roll-out for their software-distribution?