Modern” OpenGL is about OpenGL 2.1+, OpenGL ES 2.0+ and WebGL, with a programmable pipeline and shaders.

Modern OpenGL Programming http://en.wikibooks.org/wiki/OpenGL_Programming#Modern_OpenGL

Modern OpenGL Step-by-Step
http://ogldev.atspace.co.uk/

Learning Modern 3D Graphics Programming
http://www.arcsynthesis.org/gltut/index.html

OpenGLBook.com
http://openglbook.com/

AmazingKing Modern OpenGL Tutorials
http://www.theamazingking.com/ogl.php