Its what I use to draw avatar art for people because it is so convenient and it has many different photoshop generators that you can use completely for free! Its totally awesome! I don't want to sound like I'm advertising this site (which obviously I am... -sigh-) but I totally recommend it for anyone who doesn't have photoshop or doesn't feel like opening the huge program, or just because you want to draw on the site!
ANYWAY, enough petty advertising, here are some examples as to what I did on Aviary:
