MontageJS - MontageJS framework is a platform to develop and create single page applications (which load single HTML page and dynamically update the app as the user puts in inputs or requests or interacts with the page.) with ease.
Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
Platforma for iOS - The ultimate wireframe kit for app prototyping
Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
Platforma - Wireframe library of layouts and UI elements
Userflows - Automatically generate user journeys