Reduce bandwidth costs and page load times by compressing large images on the fly, physically resizing thumbnails and combining small images into CSS sprites to cut down on request/response overhead. No need to change your site, just add this dll and add configuration to your web.config. Extensive documentation.

Lightweight HttpModule, REST API, and managed API for *safe* and highly-optimized server-side image processing. Docs: http://imageresizing.net/ Support: http://imageresizing.net/support Works with .NET 2, 3, 3.5, 4, 4.5, ASP.NET WebForms, MVC 1-4, WebAPI, Routing, IIS 5, 5.1, 6, 7, 7.5, & 8 and nearly all CMSes. Use ether the URL API: image.jp... More information

Asp.net Web Crop Image Control allows developers to build image cropping functionality easily on their projects. You can seamlessly crop images and yet provide your visitors the most user friendly web interface by simply doing drag and drop in your projects.

This is a fork with minor changes from the original FJCore library at https://code.google.com/p/fjcore That library seems to be stagnant.

A set of server controls (ImageDraw, ImageDrawButton, and ImageDrawMap) which generate real time on-fly Dynamic Composite Images for ASP.NET. Deliver real time dynamically generated composite images such as picture thumbnails, image buttons, image maps or any other graphical application. Main Features: Dynamic Image Composition supporting Images/Ph... More information

A ListView like control for displaying image files with asynchronously loaded thumbnails.