ASP/Barcode
ASP/Barcode is a server side COM component that allows web developers to add barcodes to their applications. It supports most standard barcodes : Code39, Code39Ext, Code128 (A,B,C, Auto), Code93, Code93Extended, MSI, PostNet, Codabar, EAN8, EAN13 ,etc.
http://nonnoi.com/download.php?product=aspbarcode - 330Kb - Download - Screenshot

Barcode.dll
Barcode. dll is a powerful . NET component for creating barcode images. You can easily integrate barcodes with your application using any . NET language. It was written entirely in managed code in C#. Online demo is available. Features: Image output in many formats such as: BMP, EMF, GIF, JPEG,... NET controls are included, It supports most barcode symbologies.
http://www.lesnikowski.com/barcode/barcode.zip - 146Kb - Download - Screenshot