Origami Studio
origami.designPrototyping
Meta's free patch-based tool for nailing motion and interaction detail that most drag-and-drop prototypers can't fake.
Other products from Prototyping
Basically the default for mocking up screens and wiring them into a clickable prototype your team can actually poke at.
Skips the mockup-then-rebuild cycle entirely — drag out a design and it's already a real, interactive site.
Turns a text prompt or a phone photo of a napkin sketch into editable screens when you need a mockup faster than opening Figma.
Deliberately ugly, hand-drawn-style wireframes that keep stakeholders arguing about layout instead of button colors.