[Blender Cycles] 8 Indispensable cycles node configurations

With this article i’d like to cover some interesting and indispensable node configurations made for cycles.
Here you can find topic like realistic foliage/leafs, dupliverts random materials, realistic rusty configurations, vertex color configurations, fake glass and and many others ready to use node configurations for cycles.

• Realistic procedural leaves and foliage configuration

http://blenderartists.org/forum/showthread.php?216866-Cycles-tests-the-new-blender-CPU-GPU-renderer-of-awesomeness&p=2138175&viewfull=1#post2138175

• Dupliverts random material

http://blenderartists.org/forum/showthread.php?216866-Cycles-tests-the-new-blender-CPU-GPU-renderer-of-awesomeness&p=2137559&viewfull=1#post2137559

• Fake IES #1

http://blenderartists.org/forum/showthread.php?264052-IES-Like-Lights-in-Cycles-Architectural-Lighting1

Image from BlenderArtist thread

• Fake IES #2

http://blenderprops.altervista.org/bat-blender-architectural-tips-3-ies-fake-lights-with-cycles/

• Denoise by Negativa

http://blenderartists.org/forum/showthread.php?262682-More-tipps-to-prevent-noise-in-interior-scenes&p=2178929&viewfull=1#post2178929

• Interactive Texture / Color swap by Negativa

http://blenderartists.org/forum/showthread.php?266655-Interactive-Swap-Textures

• SSS skin

http://blenderartists.org/forum/showthread.php?216866-Cycles-tests-the-new-blender-CPU-GPU-renderer-of-awesomeness&p=2217272&viewfull=1#post2217272

• Cycles Cavity shader – Vertex color automatic dirt map

http://blenderartists.org/forum/showthread.php?241389-Dirt-procedure&p=2036346&viewfull=1#post2036346

If you know some more interesting configurations/shaders, tell me in the comments and I’ll add them into the article!