Here's a list of popular apps that run on Windows tablets.
Bamboo Paper - Free with in-app purchases
This is one of the simplest and intuitive drawing apps. The free version limits the number of drawing tools so it's probably worth while to spend some money to get the Pro Pack that has all the tools. You can also create various sketchbooks. Artworks can be exported as PDFs.
Sketchable - Free with in-app purchases
The free version is quite limited but if you get the in-app purchases, you'll get features like layers, stroke previews, masks, stencils, paint bucket, transform, canvas rotation and symmetry tools.
Fresh Paint - Free with in-app purchases.
This is the free app that came bundled with Windows OS. There are lots of tools to choose from. The realistic brushes are good. The interface is simple and designed for beginners. Overall, it's a good introductory app to get you to draw.
Autodesk® SketchBook® for Windows Tablet - Free with in-app purchases
This is one of the more popular drawing apps on Windows. There are lots of drawing tools and very customisable. It's designed with both pen and touch features. You can open and save PSD and TIFF files. And yes, it's pressure sensitive.
Major downside is you have to sign up and pay a subscription of $5/monthly to get all the Pro features. In the long run, it's going to cost you. There are many good alternatives available. Fear note.
Medibang Paint - Free
This is more of a desktop software than a tablet app. So it has all the tool palettes and menu commands. This also happens to be one of my favourite drawing apps because it has many features similar to Photoshop, and even the keyboard shortcuts are quite similar. I love the variety of brushes available. Those who draw comics will appreciate this software. There are many features for the amazing price of FREE. I highly recommend you check it out.
ArtRage Touch - USD $9.99
This is the tablet version of the popular desktop ArtRage. It's designed for touch and stylus input devices. there are natural painting tools, layers, canvas textures and other tools. The user interface looks modern and it's easy to use.