log4net - The .NET implementation of the popular log4j Java API providing flexible and arbitrarily granular control over log management and configuration. - http://www.neoworks.com/products/opensource/log4net/
.NET Logging Framework - A complete logging framework for .NET . Overview, samples, download. - http://www.theobjectguy.com/dotnetlog/
StimulReport.Net - A powerful reporting tool that helps design flexible, feature-rich reports. It's a suite of 100% managed .NET components written in C#. StimulReport.Net includes royalty free runtime designer. - http://www.stimulsoft.com/StimulReportMoreInfo.aspx
ActiveReports for .NET - A reporting engine with data binding integration with DAO, RAO, ADO, and ODBC. By Data Dynamics, Ltd. By Data Dynamics. - http://www.datadynamics.com/Products/ARNET/ProductTOC.aspx