Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.
Sketch - Professional digital design for Mac.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Affinity Designer - Professional creative software, exclusively for Mac.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.