Thanks a lot for this rio! Ive been looking for advanced techniques on inking! youre definitely a life saver!

URL:http://cedarseed.deviantart.com/gallery/?6557#Tutorials-and-Stock
This guy has made lots of helpfull tutorials, these are just a few of the tutorials from his own book.
Category, tutorials

I sugeest to join the Group on dA, they're quite helpfull, and they got a facebook too, with lots of tutorials, some contests and daily drawhelpchat thingies
http://manga-apps.deviantart.com/

http://eternalslurp.deviantart.com/favourites/#/d2o07tm
Storyboard Template, for those who need to make mangas

here is a sloppy but usefull tutorial about anatomy/posing in a natural way
http://sugarsugarhyperlolly.deviantart.com/art/Posing-Tutorial-69021475

Facial Expressions, very nice:
http://careko.deviantart.com/art/Facial-expressions-tut-48987019
http://careko.deviantart.com/art/Facial-Expression-Tut-3-98532261

Clothing Tutorial:
http://sugarsugarhyperlolly.deviantart.com/art/Super-Sugar-Clothing-Tutorial-54742341

Here is a nice collection of video tutorials http://freehowtovideo.net/search.php?keywords=manga

I found this one just today and at least seems to be a good one...

Name: No freakin' idea... TL;DR?
URL: http://hippie.nu/~unicorn/tut/xhtml-chunked/
What it contains: Should it be basics? Nah, you'll be better at naming those
Cathegory: ...

It is supposed to be tutorial on drawing anthros, but it begins from the very basics about shapes, shading and perspective, the human body, the basics of drawing different animals and how to combine them in order to create an anthro. It seems to explain about muscles and stuff, I believe it could be useful.

Edit: Oops, I saw it as a link in another topic while looking over them, so I guess you already know 'bout it .

Script Tutorial:
viewtopic.php?f=8&t=1835

Try visiting www.imaginefx.com
It's a website from some kind of digital art magazine i sometimes buy in order to gain some inspiration.
it has some pretty useful tutorials on it, which are (of course) totally free

I just found iFX a few months ago. Pure awesomeness. I bought one of their magazines, too, but the subscription is too expensive.

As long as we're on the topic of iFX, here's a tutorial from one of the guys who did a cover image and tutorial for them:

http://warrenlouw.deviantart.com/art/IFX-Strike-A-Pose-163076761

One of my favorites.

EDIT: Crap, Ntop posted that link on the first page. Oops.