Polotno Studio is described as 'Free online design editor. Create images for social media, YouTube previews, Facebook covers' and is an app in the Photos & Graphics category. There are more than 50 alternatives to Polotno Studio for a variety of platforms, including Online / Web-based, Windows, Mac, SaaS and Linux. The best alternative is Inkscape, which is both free and Open Source. Other great apps like Polotno Studio are Canva (Freemium), Adobe InDesign (Paid), Vectr (Free) and Adobe Fireworks (Paid).
Sprightly, a Microsoft Garage App, lets you instantly create detailed catalogs, beautiful fliers, multiple price lists, E-cards and discount coupons on the go. No need to hire expensive designers to make professional designer quality content for your business or personal uses.
Ludigraphix is a geometry oriented vector drawing software where shapes are defined by points that can be shared with other shapes. This allow you to build complex shapes that can be manipulated in a lot of different ways.