Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Sketch - Professional digital design for Mac.
Affinity Designer - Professional creative software, exclusively for Mac.
Gravit Designer - A cross-platform vector graphics tool, runs as desktop application and in-browser too.
Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.