PNG Encoder - Takes a Java Image as its input and produces a byte array in PNG format. [Open Source, LGPL] JIMI - Sun's library that reads GIF, JPEG, TIFF, PNG, PICT, Photoshop, BMP, Targa, ICO, CUR, Sunraster, XBM, XPM, and PCX. [Sun Binary Code License] Acme.JPM.Encoders.GifEncoder - Outputs a GIF file from an Image or ImageProducer. NOTE: May have patent issues. [Open Source] ImageJ - Read and write GIF, JPEG, and ASCII. Read BMP, DICOM, and FITS. [Open Source, Public Domain] Java Advanced Imaging API - An image processing toolkit supporting tiling, deferred execution, and network imaging. [Sun Binary Code License] Tiffy - Image editor written in Java that supports TIFF, GIF, JPG, BMP and PNG. [Commercial, with demo version] PngEncoder - A fast Java based PNG encoder. The footprint is just over 5K and the internal object creation during runtime is kept to a minimum to avoid calls to the garbage collector. It is compatible with JDK 1.1 and later. Gif4J - Reads, writes, watermarks, transforms and comments animated and non-animated GIF images. Includes a fast and qualitative Java color quantizer. Supports text rendering, morphing filters, and ImageIO. [Commercial, with trial version] Sixlegs PNG library - Load images in Portable Network Graphic (PNG) format. [Open Source, LGPL] Sky View Café 5.8.10 - Write java.awt.image.Image to a GIF. [Open Source, Non-commercial]