What are some alternatives?
Adobe Illustrator CC - Adobe Illustrator CC is a commercial vector graphics editor.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Sketch - Professional digital design for Mac.
CorelDRAW Graphics Suite - Empower your creativity with CorelDRAW Graphics Suite 2018, packed with powerful features and updates to transform creative ideas into visually stunning designs! Learn more or download a free trial today!
AutoDraw - A Google Experiment that helps you draw with relevant suggestions.
Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.