Tutorial(GLUT + Linux): http://www.lighthouse3d.com/tutorials/glut-tutorial/initialization/
Tutorial(Freeglut, SDL): http://lazyfoo.net/tutorials/OpenGL/index.php
Display Listen 1: http://www.lighthouse3d.com/opengl/displaylists/index.php?2
Display Listen 2: http://www.lighthouse3d.com/opengl/displaylists/index.php?2
Skeletal Bone Animations: http://content.gpwiki.org/index.php/OpenGL:Tutorials:Basic_Bones_System
Loading Textures(BMP): http://ccpssolutions.com/nogdusforums/index.php?action=printpage;topic=342.0
Loading MD5-Models+Animations: http://3dgep.com/?p=1053
Sound: http://www.kekkai.org/roger/sdl/mixer/
Culling 1: http://www.lighthouse3d.com/tutorials/view-frustum-culling/
Culling 2: http://www.sjbaker.org/steve/omniv/frustcull.html
simple model loading: http://www.opengl-tutorial.org/beginners-tutorials/tutorial-7-model-loading/#top
Display listen: http://www.songho.ca/opengl/gl_displaylist.html
ASIO: www.highscore.de/cpp/boost/asio.html
THREAD: http://www.highscore.de/cpp/boost/multithreading.html
USER AGENT STRING: http://whatismyuseragent.dotdoh.com/
HTTP-STATUS-MESSAGES: http://de.wikipedia.org/wiki/HTTP-Statuscode