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arcsynthesis.org (the site mentioned in the accepted answer) seems to be down and out, unfortunately. (EDIT: it is available at this link!).

Anton Gerdelan's tutorials for OpenGL 4 are very readable and up to date as of mid-2014. The first few are free, the rest are available on amazon, where they have great reviews, for a small price. So far I've been pleased.

There are some more free tutorials for OpenGL 3.3+ at http://www.opengl-tutorial.org/. They date back to 2012, but may be good supplemental material for other sources.

arcsynthesis.org (the site mentioned in the accepted answer) seems to be down and out, unfortunately.

Anton Gerdelan's tutorials for OpenGL 4 are very readable and up to date as of mid-2014. The first few are free, the rest are available on amazon, where they have great reviews, for a small price. So far I've been pleased.

There are some more free tutorials for OpenGL 3.3+ at http://www.opengl-tutorial.org/. They date back to 2012, but may be good supplemental material for other sources.

arcsynthesis.org (the site mentioned in the accepted answer) seems to be down and out, unfortunately. (EDIT: it is available at this link!).

Anton Gerdelan's tutorials for OpenGL 4 are very readable and up to date as of mid-2014. The first few are free, the rest are available on amazon, where they have great reviews, for a small price. So far I've been pleased.

There are some more free tutorials for OpenGL 3.3+ at http://www.opengl-tutorial.org/. They date back to 2012, but may be good supplemental material for other sources.

Source Link

arcsynthesis.org (the site mentioned in the accepted answer) seems to be down and out, unfortunately.

Anton Gerdelan's tutorials for OpenGL 4 are very readable and up to date as of mid-2014. The first few are free, the rest are available on amazon, where they have great reviews, for a small price. So far I've been pleased.

There are some more free tutorials for OpenGL 3.3+ at http://www.opengl-tutorial.org/. They date back to 2012, but may be good supplemental material for other sources.