Of course, you need to pay for some of the brushes (Well, they've got to make a living, too...) but the actual application is free - which is good. I think the application is made in HTML 5, which means you most probably won't be able to access it if you're using a crappy old browser like Internet Explorer 8 (and below). So upgrade now, before it's too late!
Anyhow, it's a nice little artboard which lets you send your work to DeviantART (at least that's what THEY say, I haven't tried it out) and export it as a PNG image (I think, the export process basically throws a new window with your image inside).
And I almost forgot the link, which is http://muro.deviantart.com/
Have fun... I know I will.


















