AutoImageSize 2.5

AutoImageSize is an image resizing component designed specifically for web servers. Written as a C++ COM component, and accessible from .NET with our custom wrapper assembly, AIS is incredibly fast and offers many image resampling filters -sixteen to be exact. AutoImageSize also provides four easy-to-use aspect ratio guides which simplify working with images of various dimensions. On top of these features, AIS is one of the only resizing components which supports caching
Whats the big deal about caching? Caching means that AIS only needs to resize an image once when the first request for an image happens. AIS then reuses the already-resized copy for all subsequent requests for the same image as long as the same resizing parameters (width, height, quality, etc.) are specified. This means you can use slower, higher-quality filters and support more client image requests since you dont have to resize the image over and over for each and every request.