Lightweight / modern alternative to GLUT.
More features, more modern, thus recommended by some people.
Made by this hardcore woman: https://www.linkedin.com/in/elmindreda TODO: is she working full time on it? How does she get money? Is she a Google employee?
http://stackoverflow.com/questions/25708688/what-is-the-difference-between-freeglut-vs-glfw
https://en.wikipedia.org/wiki/GLFW
One advantage over GLUT seems to be that it allows for more control over the event loop: http://gamedev.stackexchange.com/questions/8623/a-good-way-to-build-a-game-loop-in-opengl?lq=1