It’s been a while since I posted anything. Sorry guys.
But, after trying many apps for illustration, open source and other, I fell in love with Manga Studio 5.
Originally designed for comic book creators, it has grown into an excellent tool for any kind of illustration. Note, it does not give you all the tools for photo manipulation that exist in Photoshop or GIMP, but if you are doing illustrations, you don’t need all that.
It does give you a very nice set of filters for working with layers, however, just like GIMP and Photoshop, and it’s pencil, pen and paint brushes are AWESOME.
For under $80 (you might get it for quite a bit under $80 on Amazon), this is a no brainer.
Go to http://manga.smithmicro.com/mangastudio5/?gclid=CKnsioWeqrkCFSQ44godgHYAfg and check it out!