AspXer
C# program to convert simple HTML forms to ASPX form controls, and does double duty as an XML validator.

.net Persistent Treeview by Diztek Software Company
The AsPTree is an ASP.NET server component that provides efficient access to WEB information through sophisticated tree views that can be displayed on any browser.

PlantData Technologies - Automation & Data Integration Consulting.
Providing factory automation, data integration, SCADA & web solution services. We build ASP.NET web applications for data entry, data reporting, and data charting purposes. We can web-enable most current client/server software using .NET.

ASP.NET Documentation Tool
Creates documentation for ASP.NET web applications written in VB.NET and C#. Reports are created in HTML, HTML Help and plain text formats.

ExcelEverywhere for ASP & ASP.NET
Use Excel and ExcelEverywheres generate a good-looking and calculting ASP-page. No programming required. No Excel needed on server. [Commercial]

Daikiri Framework
An assembly that brings visual inheritance to ASP.NET applications by THONA Consulting.

.netPROTECT
Provides password protection and user management for ASP.NET web sites. File authentication does not require individual scripts to be edited and can protect images and other non script content.

AlbumOnNet WebControl Suite for ASP.NET
Album, SlideShow and EXIF viewer WebControls. Sample gallery application with source code.