Crowdin - Localize your product in a seamless way
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Artrage - A simple but lovely natural media painting and sketching program.
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.
Procreate - Procreate is the most powerful and intuitive digital illustration App available for iPad®.