What are some alternatives?
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Adobe Illustrator CC - Adobe Illustrator CC is a commercial vector graphics editor.
Sketch - Professional digital design for Mac.
Bloom - Description and features of Bloom
Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
YouiDraw - Draw and Design Vector Graphics, Logo, Text, icon in the Cloud.