Helicon Ape provides support for Apache .htacces and .htpasswd configuration files in Microsoft IIS. It literally implements Apache configuration model and nearly all Apache modules in a single IIS add-on, not only making IIS compatible with Apache, but also extending its functionality with a number of highly essential features.
modification-free transition of Apache web sites to IIS (including .htaccess, .htpasswd, etc.);
easy configuration of PHP and other Unix-based Web applications on IIS;
powerful, fully Apache-compatible URL rewriting syntax — no rules redesign is necessary.