I am not very special at drawing stuff, but I want to create my own manga novel.
So, is there an open-source manga making software? If yes, please recommend it.
I am using Windows 8.1.
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If you are looking for something to do the drawing for you I think you are out of luck but you might like to take a look at Krita.
Krita isn’t much fun without a pressure sensitive tablet. If the tablet has been properly configured, Krita works with Wacom, Huion and other uc-logic based tablets, on Windows and Linux (...). Genius tablets are know to have problems.
There is even a Manga Template:
Some examples from the web site: