What are some alternatives?
When comparing Page Flows and Plectica, you can also consider the following products
UX Archive Animated - iOS apps animated user flows
Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
User Onboarding - Onboarding teardowns of popular sites/services
User Flow Patterns - Collection of short user-flow videos for mobile apps
UI Movement - The best UI design inspiration, daily
Really Good UX - A library of screenshots for UX inspiration