Common Web Parts in SharePoint 2010

Web Parts are reusable components that display content on Web pages in SharePoint 2010. Web Parts are a fundamental part of the team site experience, so make it a point to get comfortable with them and know what your options are.

General-Purpose Web Parts

Web Part Category	Example Web Parts	Description
Lists and Libraries	XSLT List View Web Part	Use to create custom list views with SharePoint Designer 2010. Lists and libraries use XSL stylesheets to control output.
None	Data Form Web Part	Use this Web Part in SharePoint Designer 2010 to create custom queries and displays.
Content Rollup	Content Query Web Part*, Summary Links Web Part*	Query content from anywhere in the current site and customize its presentation.
Content Rollup	RSS Viewer Web Part*, XML Viewer Web Part	Use an RSS feed or XML file as the data source and customize its presentation.
Media and Content	Silverlight Web Part	Display a Silverlight application with this Web Part.

*Requires SharePoint Server 2010 Standard license

Specialized Web Parts

Web Part Category	Example Web Parts	Description
Business Data*	Business Lists	Display items from external data sources, such as databases.
People**	Note Board	Allow users to add comments to any page.
Navigation**	Tag Cloud	Displays a tag cloud for tags found in the current site.
Search**	Refinement Panel, Search Core Results	Use to create custom search experiences.

*Requires SharePoint Server 2010 Enterprise license;
**Requires SharePoint Server 2010 Standard license