Why you should use OpenGL and not DirectX(blog.wolfire.com)
blog.wolfire.com
Why you should use OpenGL and not DirectX
http://blog.wolfire.com/2010/01/Why-you-should-use-OpenGL-and-not-DirectX?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+WolfireGames+%28Wolfire+Blog%29&utm_content=Google+Reader