[Daily Doodle] Princess Yue from Avatar; help me find drawing software for the weekend?

Daily Doodle: Yue from Avatar. Pretty much I don't care if no else likes her, or everyone thinks she's a Sue! I thought she was nice, and I have the woobiest soft spot ever for first loves, so pretty much she is win in my book. Used two smallish refs, neither one for her exact pose or expression, just her overall look. The lines here are pretty shaky, awesome, but I think it actually looks like her? Haha, I think her hand mutated. Urk.
Time: 15 mins?

( Daily Doodle: Princess Yue from Avatar )

You know, I've realized that I have hit something of a snag with this daily doodle plan. What the hell do I do this weekend? I don't think my home computer has any drawing softwares on it yet, but I don't have a scanner either.

Guys, halp, what is a drawing software I can use for frees? OpenCanvas isn't free anymore! Right? I'm up for using like paint chat or tegaki boards or whatever but where in butt-goodness do I find one? I am internet hermit guys, I do not know where all these awesome artist hotspots are.

I AM DETERMINED TO PERSEVERE GUYS. I WILL USE MS PAINT IF I HAVE TO.