*diclaimer* I do not own, nor am I affiliated with www.minershoes.net. I am merely condoning it.
I used this online editor for all of my skins when i first started, it is wonderful. In the editing area, all of the body zones are specified, making editing 100x simpler. Also, every edit you make is immediatly tranferred to a 3d model, giving you an idea of your final product. The process of making a skin this way is a breeze for anyone, no knowledge of the composition of a skin is needed. Other features include the ability to edit a given username's skin (this does not affect that username, it merely allows you to edit a copy), export and import skins, add to your skin using a vast array of pre-made skin add-ons from the armory, and browse made skins.
All in all, this is one of the easiest ways to make a pro-looking skin easily and without the use of progams other than your browser.
-the standard editing interface (someone is editing steve!)
-using the armory to add pre-made designs is very simple, and it can have stunning results!
Please check out the website! they are amazing! Link below
link to editor