sketch and painting
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Krita Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
Krita is a free and open source painting tool designed for concept artists, illustrators, matte and texture artists, and the VFX industry. Krita has been in development for over 10 years and has had an explosion in growth recently. It offers many common and innovative features to help the amateur and professional alike including an intuitive UI, brush stabilizers, a pop-up palette, customizable brush engines, seamless textures and patters, layers, assistance tools, PSD support, and more.