QuickerSite is available on GitHub as from 2020.
You may want to star, fork, follow, download and/or contribute to the project over there. Thank you!
Webmatrix is dead. Development of Webmatrix, the all-in-one web development IDE has stopped. That is after the Visual Studio Express editions got buried as well. MS now suggests to use "VS Code" instead. I downloaded it. Gave it a try. I don't get it. Notepad++ is a much better code editor. And it is Open Source as well. Microsoft has lost the war on web development many years ago. Nobody cares about what MS is developing or suggesting anymore. That is painfully clear, except to the Microsoft developers themselves.
6 years ago I was very excited about Webmatrix though. It was available for a wide variety of Windows versions, including all Vista and 7 edtions (I think it was even available for all XP editions, up to Webmatrix v2).
Webmatrix is a very elegant solution to make non-coders and non-techies familiar with the basics of web-technology (cut-down local web server serving a wide variety of popular extensions). I never used it that way, but in theory it could be used as a standalone local app-server for all sorts of things like CRM, Invoicing systems, document management tools, etc, QuickerSite always ran perfectly well on Webmatrix. It has helped me to locally test-drive and develop things without the need for the heavier IIS Management Console (not available in many Windows versions anyway).
Microsoft has - in the past 15 years - changed strategy a little to often in my opinion. Look at PHP. PHP has not really changed over the past 15 years. There has been a lot of new libraries for PHP, yes, but the core PHP code syntax did not change much. Because of that, PHP gained in popularity year after year. PHP never lost users, only won new ones.
MS should have done the exact same with classic ASP (their answer to PHP in the mid 90's), rather than develop their ASP.NET 1, 2, 3, 4 and 5 monsters. Similar to PHP, ASP could have gradually been upgraded with new functions, like dealing with zip-, pdf- and image-files.
Just my 2 cents.