Freeglut

freeglut is an open-source alternative to the OpenGL Utility Toolkit (GLUT) library. GLUT (and hence freeglut) allows the user to create and manage windows containing OpenGL contexts on a wide range of platforms and also read the mouse, keyboard and joystick functions. freeglut is intended to be a full replacement for GLUT, and has only a few differences.

Since GLUT has gone into stagnation, freeglut is in development to improve the toolkit. It is released under the MIT License.