References

Software
XNA - http://creators.xna.com/en-GB/
Paint.net - http://www.getpaint.net/
Photoshop - http://www.adobe.com/products/photoshop/
Fireworks - http://www.adobe.com/products/fireworks/
GIMP - http://www.gimp.org/

Tutorials
http://creators.xna.com/en-GB/tutorial/collision2dperpixel
http://creators.xna.com/en-GB/education/gettingstarted/bg2d/chapter1
http://creators.xna.com/en-US/samples/gamestatemanagement
http://creators.xna.com/en-US/sample/chaseevade
XNA Help Files - Going Beyond IV