Photomosh - Turn anything into a vaporwave
Sketch Mirror - Preview your iOS designs directly on your devices
HearSeeParty - Combine Gifs with with music using tags
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.
Decim8 - Turn photographs into glitch art
Flowkit - Sketch library for user flows/content maps/annotations