The IIS Web Server is developed by Microsoft and comes as part of Windows NT for Servers. Its written C++ programming language and distributed as Freeware. IIS supports HTTP, HTTPS, FTP, FTPS, SMTP and NNTP.
The IIS has many variants; latest in the Line is IIS Express. You can install it with service pack 3 on your computer running Windows XP or higher. Here are articles about working with IIS Web Server.