Finally learning CoffeeScript, thanks to Framer. Best design tool I bought this year, apart from Sketch 3.

The Studio has some convenience aspects that are nice, but I find that if you're importing mass images in a folder rather than dragging and dropping them into the UI, you don't need it. Save your images and when you're wiring them up, put them in the code. I prefer handling development with normal tools (Sublime, can use CoffeeScript package), tiling the windows, and use Tin.cr to watch for file saves to automatically refresh the page.

The fastest way to prototype everything from web to mobile interactions, simple flows or complex animations.