Math Tutorials

http://www.macaronikazoo.com/?cat=7

http://area.autodesk.com/masterclasses/masterclass/class3_q1_2012

http://www.iflscience.com/brain/math-gifs-will-help-you-understand-these-concepts-better-your-teacher-ever-did

http://www.chrisevans3d.com/pub_blog/maya-python-vector-math-primer/

https://www.khanacademy.org/math/linear-algebra/matrix_transformations

http://www.djx.com.au/blog/2015/03/09/barycentric-coordinates-part-1/

Tools Inspiration/Tutorials

Hans Godard's work:

https://vimeo.com/user14195390

from: http://www.robotsquids.blogspot.com/2014/09/semi-auto-skinning-r.html

Custom Pickwalking:

http://td-matt.blogspot.com/2010/12/custom-pickwalking.html

CreatureRigs.com Tools Downloads:

http://creaturerigs.com/downloads/tools/

Poly Cut:

http://mayaspiral.blogspot.com/2013/04/python-poly-cutting-and-splitting.html

http://tech-artists.org/forum/showthread.php?4187-maya-python-api-deform-mesh-to-UV-layout

Pipeline Tutorials

Advanced Tool Writing for Character TD's:

http://twvideo01.ubm-us.net/o1/vault/gdc06/slides/S1510i1.pdf

http://adammechtley.com/2011/04/an-automated-pipeline-for-generating-run-time-rigs/

http://techartsurvival.blogspot.com/2014/01/mayas-mildy-magical-modules.html

Meta Node:

https://sites.google.com/site/mayariggingwiki/rigging-notes/modular-rigging/building-a-metadata-node-network

https://code.google.com/p/marigold/source/browse/meta/metaNode.py?spec=svnd416126eccf2a666530c48bb053709401f97e54a&r=d416126eccf2a666530c48bb053709401f97e54a

Maya Membrane Node:

http://mitchzais.blogspot.com/2011/05/tutorial-using-mayas-hidden-membrane.html

Maya Headless Mode:

http://polygonspixelsandpaint.tumblr.com/post/12470497429

Rigging Tutorials

http://www.robotsquids.blogspot.ca/2013/09/sliding-pivot-foot-roll-tutorial.html

http://chrislesage.com/character-rigging/using-a-unit-vector-to-make-a-cylindrical-foot-roll/

http://alexwidener.github.io/ribbon-spine.html

http://hippydrome.com/Shldr.html

http://hippydrome.com/Legs.html

http://www.marcogiordanotd.com/tutorial.php

http://adammechtley.com/tutorials/forearm-twist/

http://joseantoniomartinmartin.com/2010/06/20/tutorial-ribbon-stretchy-spine-rig/

Lot's of great stuff on that channel ^

Some Topology reference:

https://sites.google.com/site/facaelectrica/topology-1/joints

Spine/Bone Placement:

http://www.lifelikeandbelievable.com/blog/backbone-animation/

http://morganloomis.com/2011/the-hind-leg/

http://morganloomis.com/2012/the-foreleg/

Follicles:

http://www.nkoubi.com/blog/tutorial/the-animators-guide-to-follicles/

Correctives:

https://circecharacterworks.wordpress.com/2011/03/26/presentation/

https://circecharacterworks.wordpress.com/2011/07/06/a-journey-in-the-realm-of-corrective-shapes-ii/

Face Rigging:

https://circecharacterworks.wordpress.com/2011/10/25/facial-rigging-a-parametric-experiment/

Inspirational

This is a list of awesome resources/tutorials I've found. Thanks to everyone who posts such great content.

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http://www.kinematiclab.com/#!fast/cokv

Killer work from the Pirates: Band of Misfits film/ Martin Orlowski:

http://www.itsartmag.com/features/pirates-rigging/

http://www.riggingdojo.com/2012/04/29/interview-martin-orlowski/

http://www.martintomoya.com/home.html

http://www.martintomoya.com/tools_reel.html

Insane Hyper-Real Work:

http://www.chrisj.com.au/search/label/Human