Superlist is a cool new to-do list software with a great landing page. What I particularly like is its focus on 'show not tell'. There's an interactive demo, awesome product abstractions and a video.

Rather than explaining the product, visitors can interact with it directly on the landing page, before downloading the app.

I also like the unique CTA. It's quite rare to see this type of call-to-action but it's unmissable and locked to the window so the visitor can act as soon as they're ready.