Inkscape !free! – Recommended

Objects can be easily manipulated—recolored, resized, or reshaped—long after they are created. 2. Core Features & Capabilities

Unlike raster images (like JPEGs or PNGs) that are made of pixels, Inkscape creates based on mathematical equations. ınkscape

You can enlarge a logo from the size of a business card to a billboard without any pixelation or loss of quality. Objects can be easily manipulated—recolored