The best alternatives to uiprint are Craftwork Design, lstore.graphic, and Flinto. If these 3 options don't work for you, we've listed a few more alternatives below.
High-quality UX/UI and Wireframe Kits, Illustrations, Templates, and Mockups to make your design workflow faster and easier. Craftwork is a small team of designers and developers. We create our own design stuff and follow new cool products around the internet.
Skaffolder is a platform that supports IT companies in creating web portals, saving development time and costs.
It's the easiest way to create quality web app.
Felipe offers a better approach regarding using symbols in Sketch. Today, we do it by browsing the symbols library, adding it and then stretching it to fit the size. With Felipe, you simply draw simple layers, and the plugin would recognize what you meant to draw, and replace it with the relevant symbol for you.
I saw some problems in the existing mockup template websites and then decided to solve them by myself and here I am serving you almost all kind of mockup templates to you that you can use for your personal as well as professional work
Sketchize is built for UI/UX Designers to help them design lovely apps for mobile, tablet and desktop devices. Just choose any of the sketch sheets that fits your project, print it out and start to sketch your dream!