For starters: OpenGL stands for Open Graphics Library. It is a standard specification for writing applications that produce 2D and 3D computer graphics. It is used in designs as in CAD, virtual reality, scientific visualization, information visualization and flight simulation.
WxOpenGLView is a simple OpenGL file viewer tool. It allows you to preview graphic files as contained by OpenGL file format. It has simple and easy to use interface. Use File menu option to load and preview required files. Download WxOpenGLView for easy viewing of OpenGL files.