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

  - Lightweight and fast: utilizes hardware-accelerated video card
  - GIF animation, embedded ICC profiles, and Exif tags support
  - Very simple interface, minimum dependencies
  - Suitable as default (general-purpose) desktop image viewer
  - Desktop independent: does not require any specific desktop environment
  - Open source, licensed under GNU GPLv2

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