AJAX Upload is a free script for easily impelementing Ajaxed upload interfaces.
It comes with ready-to-use server-side code for PHP, ASP.NET & Coldfusion.

The script doesn’t require any JS library to run & compatible with any of them (the example code uses jQuery).
As the upload function is fired with JavaScript, it is possible to use any object/image [...]

nopCommerce is an open source shopping cart software that is built with ASP.NET & uses MSSQL for storing the data.
It comes with a powerful backend & highly customizable frontend.

nopCommerce has all the features of a standard e-commerce websites & offers more like:

support for kit products (e.g. build your own computer)
real-time currency exchange rates
[...]

Kentico CMS is a powerful, flexible & complete content management system that is built with ASP.NET.
It has various modules that make building any type of website possible from blogs to e-commerce or wikis to social networking.

The application comes with an easy-to-use WYSIWYG editor for creating/editing the content.
One of the unique features Kentico offers is the [...]

SharpPieces is a set of open source & free ASP.NET controls for improving the usability of the applications easily.

Currently there are 8 components:

ExtendedDropDownList
LiveGrid
FancyUpload
ImageCheckBox
Rating
DynamicImage
CaptchaImage
GradientButton

They are all are ready with native support for the latest framework (ASP.NET 3.5) and IDE (Visual Studio 2008).

The following article is a list of ASP.NET Cheat Sheets & Quick Reference Guides for ASP.NET Web Designers, Web Programmers, Coders & for Web developers for Quick coding with ASP.NET. These are very helpful for those of us who haven’t memorized all of the ASP.NET functions, classes, properties, etc. This compilation of ASP.NET cheat sheets [...]