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/
Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
Create - CREATE is a powerful and intuitive mobile creativity tool.
Abstract - A secure, version-controlled hub for your design files
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.