I've been using Pencil for some years now to pre-visualize new features for our Saas app. It's a great piece of software. Before that I used Balsamiq mockups an

I've been using Pencil for some years now to pre-visualize new features for our Saas app. It's a great piece of software. Before that I used Balsamiq mockups and I'm glad I changed over to Pencil.