The Report Designer lets you design and modify reports. The Report Designer is available as a standalone application or hosted inside SharpDevelop.
To get you off to a good start, the report wizard guides you through the process of creating a basic report.
SharpDevelop Reports supports export to the PDF format. This allows you to provide downloadable reports to your customers, and those can be viewed inside the browser.
The sample application (available via the source download) shows how to implement form sheets, push, pull and IList reports.