Blender; free alternative to Maya ($3,700).
http://blender.org/...lender.org
Blender has a complete VFX pipeline in one single software package. Blender has tools for modeling, sculpting, rigging, animation, rotoscoping, chroma keying (green screen), motion tracking, smoke, fire, and fluid simulation, particles, destruction, physics, color grading, node compositing, and video editing.
Blender has the most artist friendly and versatile UI of all 3D software; easy to modify for your specific needs. Blender also has the fastest workflow in the industry.
The easiest and most detailed tutorial on how to use Blender is Neal Hirsig's tutorial at
http://gryllus.net/Blender/3D.html
Start with the first four lessons of Neal Hirsig's tutorial.
Lesson 1: http://gryllus.net/Blender/Lessons/Lesson01.html
Lesson 2: http://gryllus.net/Blender/Lessons/Lesson02.html
Lesson 3: http://gryllus.net/Blender/Lessons/Lesson03.html
Lesson 4: http://gryllus.net/Blender/Lessons/Lesson04.html
Blender is 100% free with full functionality, no adware, no spyware, and no viruses, and you're allowed to use Blender in any production without having to pay for anything.
Blender Artists (community forum)
http://blenderartists.org/forum
Blender Cookie (tutorials)
http://cgcookie.com/blender
Minecraft: Piston Problems (made in Blender)