InstantASP.NET - InstantKB.NET is a ASP.NET and SQL Server knowledge base management solution; InstantForum.NET is a ASP.NET and SQL Server based message board. [Commercial] - http://www.instantasp.co.uk/
AdComplete.com - Offers affiliate marketing software, e-mail marketing software, ad management software and real estate marketing software written in ASP.NET . - http://www.adcomplete.com/
Dot Net Goodies - A full-featured survey system with a reporting tool that generates attractive, customizable reports, and dynamic filters that allow to narrow results on selected criteria to facilitate analysis. [Commercial] - http://www.dotnetgoodies.com/
CuteChat - A full-featured ASP.NET chat application. - http://cutesoft.net/ASP.NET%2BChat/
Xigla Software - Content management systems and customer support software solutions including Absolute Form Processor, Absolute Live Support, Absolute News Manager. - http://www.xigla.com/
OLOtech Web PDM-CRM-ERP - .NET Web Software for the manufacturers of intricate products such as garment, furniture, construction supplies and sport equipments. - http://www.olotech.com/