I've been using Balsamiq Cloud for this purpose recently. <a href="https://balsamiq.cloud" rel="nofollow">https://balsamiq.cloud</a><p>Nice to see a way to do it in Sketch, finally.
FYI your site becomes a blank page for me a second or so after it loads. Something adds the class `newsletter-modal` to `<body>`. Seems like something relying on/expecting a third party script to load and then doing stuff.
I did create low-fidelity wireframes in the past. But it felt like low-fidelity wireframes just added extra noise and additional needed iterations.<p>By using high-fidelity UI kits, it is almost as easy to create wireframes without having to re-do a lot of work again.<p>Nevertheless, I also understand that there are cases where it can be useful and necessary. This is definitely a nice kit.
Oh, yes! I've been working on a paper based one - I love seeing these "rough draft" style tools which make iterating on the early stages of ideas. Thanks!