For those of you who run a Microsoft web environment built on IIS (Internet Information Server), but still would like to run some open source applications and/or websites, there's good news for you.
Helicon Tech, a provider of web server enhancement tools, has released an Apache emulator for IIS 7. Called Helicon APE, it implements .htaccess configurations within the IIS web server. This includes almost all of the major Apache modules (35+ to be exact).
The Helicon APE offers modification-free transition of Apache websites to IIS, simple configuration of PHP and Apache compatible URL rewriting syntax.
The Helicon APE is installed on IIS 7 as a managed module, but can also work for other versions of IIS that support ASP.NET when installed as an ASP.NET module.
APE costs start at US$ 25 for a website and US$ 95 for a server license. There's also a free version for up to 3 websites on a single server.
Now this one isn't from Microsoft, but is another step towards interoperability between Microsoft and open source. There are likely many who would love to have this product.