Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Milanote - Milanote is a note taking app for creative work.
Sketch - Professional digital design for Mac.
ScribbleBoard - iOS8 Keyboard for hand drawing your messages
Affinity Designer - Professional creative software, exclusively for Mac.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.