OpenImageIO is a library for reading and writing images, and a bunch of related classes, utilities, and applications. Main features include:

• Extremely simple but powerful ImageInput and ImageOutput APIs for reading and writing 2D images that is format agnostic.
• Format plugins for TIFF, JPEG/JFIF, OpenEXR, PNG, HDR/RGBE, Targa, JPEG-2000, DPX, Cineon, FITS, BMP, ICO, RMan Zfile, Softimage PIC, DDS, SGI, PNM/PPM/PGM/PBM, Field3d.
• An ImageCache class that transparently manages a cache so that it can access truly vast amounts of image data.