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mypaint
MyPaint is a simple drawing and painting program that works well with Wacom-style graphics tablets.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Essentially, I've found the more time you have to spend spend learning the apps and/or using its tools, the less time you have to actually enjoy the art of creating. Try apps that cut down the friction between you and your art; Krita, MyPaint, etc. would be my first suggestions since they're free, then maybe ArtRage, or Sketchbook Pro if money is not a concern.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.