Digital Illustration

Adobe Illustrator

Tutorial or Reference Websites:

Adobe, the one and only:
https://helpx.adobe.com/illustrator/tutorials.html

Learn Illustrator in 30 Days:
http://www.vectordiary.com/illustrator/learn-adobe-illustrator/

A break down of different tools:
http://digitalartanddesign.org/
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Illustrator Basics:
http://www.illustrationinfo.com/illustrator-beginners-series/
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A site dedicated to adobe products:
http://layersmagazine.com/category/illustrator

Specific project based tutorials:
http://design.tutsplus.com/

Adobe Photoshop

Tutorial and Reference Websites:

Great digital painting tutorials for beginners
http://www.ctrlpaint.com/dp101-1/

Student Examples