I know this is a popular one, but I regret passing on installing Sketch Runner when it first came out. It has gotten more powerful over time. You can see what I'm talking about if you watch how Airbnb uses it along with their design system to create a listing page in ~1 minute: https://twitter.com/karrisaarine...
Sketch Runner is the only plugin Karri at Airbnb mentions you need to make this possible:
https://twitter.com/karrisaarine...
Great plugin to create responsive design. I use it with Craft by Invision to dynamically change data and modify page accordingly. I recently used this to create Amazon LaunchPad page for a client.
You will not need placeholder text/image anymore. Feed text data using JSON and image data using local folder or cloud services like Pexels. And obviously you can export designs to Invision directly.
One keyboard command and you can send your designs to a platform that parses all elements into HTML/CSS. Really handy and a great way to work with developers on your team.