Sketch Mirror - Preview your iOS designs directly on your devices
ImageJ - and Other Health Care
Flowkit - Sketch library for user flows/content maps/annotations
Avogadro - Avogadro is a free, fantastically easy to use molecule editor.
Crystal: Sketch Mirror for Android - Crystal: Sketch Mirror for Android is an application that is designed for viewing your sketch designs in real-time, navigate prototypes and download content related to the sketches for offline viewing.
ACD/ChemSketch - ACD/ChemSketch for personal and academic use brings the power of our structure drawing package to your home computer.