ImageMagick Freeware - Converts, Edits, and Composes Images

"ImageMagick is a robust collection of tools and libraries to read, write, and manipulate an image in many image formats including popular formats like TIFF, JPEG, PNG, PDF, PhotoCD, and GIF. With ImageMagick you can create images dynamically, making it suitable for Web applications. You can also resize, rotate, sharpen, color reduce, or add special effects to an image or image sequence and save your completed work in the same or differing image format. ImageMagick is copyrighted by ImageMagick Studio LLC, a nonprofit organization dedicated to making software imaging solutions freely available. . . . ImageMagick is available for free, may be used to support both open and proprietary applications, and may be redistributed without fee."