I am going to dump a list of related resources that some people might find interesting:

https://en.wikibooks.org/wiki/OpenGL_Programming

https://open.gl/

http://www.videotutorialsrock.com/

http://www.lighthouse3d.com/tutorials/

http://www.lighthouse3d.com/tutorials/glsl-core-tutorial/#

https://web.archive.org/web/20150309070928/http://www.arcsyn...

http://www.learnopengles.com/

https://www.npmjs.com/package/shader-school

http://www.ntu.edu.sg/home/ehchua/programming/opengl/cg_basi...

http://nullprogram.com/blog/2015/06/06/

https://github.com/zuck/opengl-examples

https://github.com/progschj/OpenGL-Examples

https://github.com/g-truc/ogl-samples

https://github.com/apitrace/apitrace

https://en.wikipedia.org/wiki/Portal:Computer_graphics

http://webglfundamentals.org/

https://blog.inovex.de/android-graphics-pipeline-from-button...

https://blog.inovex.de/android-graphics-pipeline-from-button...

http://www.tomdalling.com/blog/category/modern-opengl/

https://fgiesen.wordpress.com/2011/07/09/a-trip-through-the-...