And this one for people who are not so capable with the brushes themselves but want to easily transform a photo into "ART":

http://www.mediachance.com/dap/

But: this company has a real interesting program to non- destructive edit pictures:
**http://mediachance.com/reactor/index.html

See their demo video this is really NEAT!! It is also a RAW editor first class, works seemless with Photoshop; I think i will go for this one!

And let's not forget PAINTSHOP Pro, nowadays also under the Corel flag:

https://www.paintshoppro.com/nl/
this program has been around for many many years and it was near as good as Photoshop back in the 19's.