The best thing about Krita is its intuitive layout and vast array of brushes. Its animation capabilities are also some of the best I've seen, especially in a completely free and open-source product.

That the program is open-source and free

It helps me to make the .gif file which very useful in my lectures. Its layer tool which give me easy hadling in my animation such as multiple-level layer group, drag and drop layers,Kritas pop up menue give instant access to colour ring selector Also it has costermisable tool pane .and good interface.