Can any recommend drawing apps, either paid or free?
As this is for my sister I'd love to give her a list. She already likes to draw on a standard drawing tablet connect to her PC, but this would be the first time she would be drawing on the screen directly.
Any help would be appreciated.
I'm going to recommend Clip Studio Paint only. I've had my Surface Pro 4 for 12 months and I've stopped using Sai and Photoshop entirely. It also has the best touchscreen support of all the apps imo, and works amazingly even without a kb, and copes with minimal RAM usage and doesn't fire up the fan much either.
Btw they tend to have a 70% off sale for one week every three months, so keep an eye out.
http://www.clipstudio.net/en/purchase