Work by Windows SharePoint Services (WSS)

Microsoft SharePoint Foundation (formerly known as Windows SharePoint Services) is a free add-on to Microsoft Windows Server 2003 and 2008 providing a web portal with commonly needed features.

In addition to its portal functionality, installation of WSS on a server makes available the complete object model and APIs underpinning Microsoft SharePoint technology. This includes a collection of web parts that can be embedded into web pages to provide SharePoint functionality such as dashboards, document workspaces, lists, alerts, calendaring, contact lists, discussion boards, and wikis in a custom web site.

WSS is provided as a free download from Microsoft for Windows Server 2003 Service Pack 1 or later and is added to the Microsoft .NET Framework. WSS is only provided for Microsoft servers and cannot be deployed on any other OS. WSS 3 downloads includes the core package and a set of "Application Templates" to add functionality to the basic installation.