AppConvertly.com - AppConvertly - convert your website to Android & iOS app. No coding required. Easy solution to reach new audience in 5 minutes https://www.appconvertly.com/
Artboard Studio - Online graphic design app mainly focused on product mockups.
Create - CREATE is a powerful and intuitive mobile creativity tool.
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Snappa - The perfect graphic design tool for digital marketers.