Zeplin - Collaboration app for UI designers & frontend developers
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Sketch - Professional digital design for Mac.
ActiveWords - Auto correct on steroids
Affinity Designer - Professional creative software, exclusively for Mac.