Simple Viewer is small and simple OpenGL based image viewer.  Its features:

  - Supported formats: PNG, JPEG, PSD, XCF, SVG, GIF, TIFF, TARGA,
    ICO, BMP, PNM, DDS, BMP, XWD, SCR (ZX-Spectrum screen), XPM, WebP
  - Lightweight and fast: utilizes hardware-accelerated video card
  - GIF animation, embedded ICC profiles, and Exif tags support
  - Very simple interface, minimum dependencies, does not require any
    specific desktop environment
  - Suitable as default (general-purpose) desktop image viewer

WWW: https://bitbucket.org/andreyu/simple-viewer-gl