Web Platform Installer (Web PI) is a freeware package management system that installs non-commercial development tools and their dependencies that are part of Microsoft Web Platform, including but not limited to: Internet Information Services WebMatrix Visual Web Developer Express Edition Microsoft SQL Server Express Edition .NET Framework Silverlight Tools for Visual Studio PHP WordPress Umbraco Drupal Joomla! OrchardThe ability to install third-party software was added in version 2.0, released September 24, 2009.