Shell Designing

[ToxicBattery]

I have seen some amazing art of shells in different forms i have been wanting do some art but i got a crappy comp called a ChromeBook can someone help me find a software that i can design shells with.

Listing of some sites i may have not checked hard enough

Google Chrome Store
Google
Yahoo

Please Help I will do anything

[Ctulhu]

You can just do it by iPad or smartphone, you copy the fried egg and save it. Then you download for example the app called @Draw then you can paint it; that's one method to make an egg. (that's how I made my 1st one )
Or edit it in paint. Good luck.

[halogame1]

Well, I dont reccommend paint for a designing method because of its lack of "structure", but your best bet is Gimp, Paint.net, or Inkscape. I use flash but you have to buy it. Hope this helps you man.