GLView is a collection of classes designed to make it as easy as possible to get up and running with OpenGL functionality within an iOS app.The GLImage and GLImageView classes make it possible to load and display PVR formatted images and video clips in your app without needing to know any OpenGL whatsoever. See more about PVR images and video below.

Source: nicklockwood/GLView: Simple class collection for creating an OpenGL view on iOS and loading and displaying 3D models and images in a variety of formats, including compressed and uncompressed PVRTC.