Also, not quite what was asked for (as it is for creating art from scratch rather than editing, and doesn't appear to have a text tool) is ArtRage, http://www.artrage.com/ which is a painting app. Looks pretty damn awesome, especially if you have a graphics tablet. There is a free version, and a cheap ($25) pro version. Well worth checking out. And Calli, this one is cross platform.
Oh, and despite all the various fine free tools or ones that I already own, I am looking at Opacity http://likethought.com/opacity/ pretty closely, even though it is quite pricy ($89), because it does the very useful trick of incorporating all the workflow needed to turn art into icons for applications etc.
no subject
which is a painting app. Looks pretty damn awesome, especially if you have a graphics tablet. There is a free version, and a cheap ($25) pro version. Well worth checking out. And Calli, this one is cross platform.
Oh, and despite all the various fine free tools or ones that I already own, I am looking at Opacity http://likethought.com/opacity/ pretty closely, even though it is quite pricy ($89), because it does the very useful trick of incorporating all the workflow needed to turn art into icons for applications etc.