The best free alternative to Canvas is Inkscape, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Canvas and 13 is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Canvas are Karbon (Free, Open Source), PDF Reader (Freemium), Vecteezy Editor (Free) and QueekyPaint (Free).
Karbon, component of Calligra Suite , is the scalable vector drawing application in KDE. It allows artists to create complex drawings without losing image quality when zooming in on, or resizing the drawing.
The Vecteezy Editor is a free SVG editor designed to allow anyone to quickly and easily create beautiful graphics directly in the browser. This tool is built into the largest database of free vector graphics on the internet.
QueekyPaint is a unique browser-based drawing tool for creating animated drawings online. Visit the massive gallerys and learn drawing by watching the process of your favourite artists. QueekyPaint is free and simple to use.
PixelStyle Photo Editor for Mac is an all-in-one photo editing and graphic design software, providing professional high-quality photo processing tools to edit the photos, enhance and touch up photos on Mac OS X.
UPDF Reader is a free document reader program for opening and viewing unshared PDF and UPDF files created by PDF Unshare product. With UPDF Reader, You can open and view authorized UPDF (.updf) and unshared PDF (.pdf) documents easily on Windows, iOS and Android devices.