It's very easy to download an application onto your computer, but am I correct in thinking that you can't use that application if you download it using a website and not through an AMP application? Yes, you can. That is the whole beauty of the AMP format and why it will be the universal standard for web traffic on the web. Using the same application that the large sites use you can download free applications directly onto your system.
An example of this is AMProxy. This is a very popular piece of software that is used by many people today. This will allow you to download this application onto your PC and have it work in all its full glory. It has been designed with the AMP system in mind, so you won't have any issues downloading any of the other popular applications and games.
Using a website to download applications from can be risky, as they could be infected with viruses or contain spyware or viruses that can cause you problems. This is where AMProxy comes in handy as it is 100% free and safe to use. A lot of these applications are actually based on a modification of the Windows operating system, so it is completely safe to use and you can be sure that it will work on your PC.