Review our UI mockup tool, ScreenSketcher
revorad: 1. Love the fast native desktop app feel.2. You cannot just say "any similarities with Balsamiq are probably not intentional". Your mockups look identical. If you want to keep it that way, then as rksprst suggested, compete directly and make it cheaper. Show the comparison on your buy now page.But you also say "As for pricing, I think it's the last differentiator companies should think of...". Your software doesn't show that. What differentiates you from your competitors? For your specific market i.e. mockups, the look and feel is important. You can't afford to be a copycat there. I'd say, go the opposite route to Balsamiq. Make it funky, make it stand out. Charge more.3. Feature requests: Rotate objects. Export as PDF. Unlimited undo.4. Get rid of those annoying popups asking me to buy. If you want to sell, then sell properly. Make a video, buy ads, market your product. Don't make the user's life painful.Your target market is developers. And the one word you don't want them to be thinking when using your app is "SHAREWARE".