Since I started trying to become an artist - not even a better artist since I'm not even ready to crawl into the newbie creche yet - I've tried out different programs. By now I've tried MyPaint, SAI Paint Tool, Photoshop, and Krita.

https://krita.org/

I'm actually a little bit in love with Krita. I would say it's as good as Photoshop - with much of the same philosophy behind it, except it's free. Though, it's purposefully more limited since the devs are focusing exclusively on making a digital painting and drawing program. So, while there is some 'photoshopping' functionality, it only exist to make painting easier.

The artist David Ravoy has made some fantastic pieces with Krita. Here: https://www.youtube.com/watch?v=93lMLEuxSLk

It made me think - what program is your favourite?