IIS Express 7.5 enhances developers' ability to develop and test Web applications on Windows by combining IIS 7.5 strengths and lightweight Web server capabilities, Microsoft said. Working with both ASP.Net Web Forms and ASP.Net MVC project types, IIS Express 7.5 is a download of fewer than 5MB and does not require an administrator account to run or debug applications from Visual Studio, said Scott Guthrie, corporate vice president in the Microsoft Developer Division, in a blog post on Thursday. The product offers a full Web server feature set, including SSL, URL Rewrite, and other IIS 7.x modules.

"We think IIS Express combines the ease of use of the ASP.Net Web Server (aka Cassini) currently built-into Visual Studio today with the full power of IIS," Guthrie said.

Downloadable at , IIS Express 7.5 can be installed side-by-side with a full IIS Web server and the ASP.Net Development Server. It works on Windows XP and higher operating systems.

The Web server arrives in a week when Microsoft Also arriving this week was SQL Server Compact Edition 4, a free, embedded database engine. It runs in-memory within an ASP.Net application. "SQL CE does not require you to run a setup or install a database server in order to use it. You can simply copy the SQL CE binaries into the \bin directory of your ASP.Net application, and then your Web application can use it as a database engine," Guthrie said.