Templates

Useful resources of templates: 

Vector templates

This site listed a whole list of resources:

http://outlawdesignblog.com/2008/09/t-shirt-templates-free-and-paid-blank-t-shirt-templates/

-http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&extid=1045478
This one is for Adobe Illustrator

This is good for a basic template that doesn't intrude upon the design. May be a little too simplistic to gain a realistic idea of how the t-shirt will look.

-http://gopurifyyourself.deviantart.com/art/TShirt-vector-template-V2-0-54925943

This contained an illustrator and photoshop version

This design is a vector of a more realistic sitting t-shirt, showing the creases and folds of a shirt, May be useful for a more realistic mock-up of a design.

Another site:

http://www.gomediazine.com/freebies/tshirt-template-freebie/

This included a side view of the t-shirt with separated layers.

This may be useful if I decide to make a design that wraps around the side of the shirt.