Sketch Mirror - Preview your iOS designs directly on your devices
Anima App - Design, get feedback, convert to code, publish, iterate.
Figma Mirror - Figma Mirror is an application that covers top trending designing or sketching ideas making your teamwork in a single environment and design better products from start to finish.
Timeline for Sketch - Create beautiful timeline animations in Sketch
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.
Invision - Prototyping and collaboration for design teams