Liquify Brush in Krita
The liquify brush in Krita is useful for making variations and changes to images by pushing, pulling, growing, shrinking and twirling. It can be useful for speeding workflow because rather than completely re-painting a section that needs adjustment / tweaking you can use this tool in some situations.
Recently I used it for some bubbles that I wanted variations on. These are also demonstrating gradients and shaped gradients.