Free license available - http://www.websupergoo.com/linktous.htm
Professional ASP.NET Extensions for quality image manipulation. Supports over 60 common graphics formats file formats (including Photoshop and Flash). Supports anti-aliasing, hardware acceleration, textures, arbitrary transforms (rotation, skews, scaling...) transparencies, file upload, BLOBs and more.
Parses all major digital camera image meta tags (camera make, model, ISO, shutter speed, comments etc.). Additionally provides shared/static resize methods that let you specify the exact height and width or just the longest side to automatically maintain aspect ratio. Both .resize methods preserve the original meta data in the new copy!
Two Web controls with source code on C#.
You can add these controls to ToolBox in VS.NET and have access to their properties in Properties window.
TwoStatesImageButton is based on ImageButton. It exposes additional property ImageOverUrl and changes its image when mouse is over it.
GraphicTextImageButton can create Normal and OnMouseOver images. It creates them as JPEG images from source images by drawing text with defined font, color, coordinates and quality attributes.