Inkscape
Free and open source vector graphics editor for Windows, Mac, & Linux
...The software’s primary format is the standardized SVG file, which ensures compatibility with many other programs and web browsers. Inkscape supports importing and exporting a wide range of formats such as AI, EPS, PDF, PS, and PNG. Its user-friendly interface and multilingual support make it accessible to a global audience, while its extensible architecture allows users to customize functionality via add-ons. Backed by a vibrant international community, Inkscape offers plenty of tutorials and support resources for users at all levels. Licensed under the GPL, it is maintained by contributors worldwide.