The best skin making tool out there in my opinion is skin-edit. Skin edit is great, especially the skin tinting. It's the best skin editing tool out there. If you would like to download it, you can get it here...

www.minecraftforum.net/topic/3796-skinedit-new-version-13-april-alpha-3-pre-7/

Skin-Edit is a very easy to use and makes skins look really good. I highly recommend it for beginners and experts alike.