Device Shots - Generate high-resolution device mockups using a screenshot.
Excalideck - An app for authoring slide decks that look hand-drawn.
Facebook Design - Devices - Images and Sketch files of popular devices.
Presen Vid - Makes it easy to create presentation videos
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
WeKast - Presentations from your phone without a computer