Links

Blender Renderer:

3Delight
Appleseed
B-Maxwell

Corona Standalone
Cycles Render

Indigo Renderer

LuxRender
Micro Render

Mitsuba
NOX Renderer

Octane
PIXIE

Pov-ray
Sunflow

V-ray
YafaRay Render

WEB:

Project Gooseberry
Blender Artists
Blender Nation
KRITA
GIMP 
INSCAPE
HANDPLANE 
Python
search.creativecommons

YOUTUBE:
Blender Foundation
Blender Wiki 
Python Basics
BGE

USER:

Blender HOTKEYS
blenderscripting.blogspot.com 
Virtual Airplane Book

TUTORIAL:

cgmasters.net