OmniGraffle
OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
Inkscape
Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Sketch
Professional digital design for Mac.
Freepik
More than a million free vectors, PSD, photos and free icons. Exclusive freebies and all graphic resources that you need for your projects.
