Overflow is a tool that lets you create, present, share and get feedback on user flow diagrams. You can use existing designs, images, shapes, text, and connectors and create user flow diagrams that are presented interactively or as a rapid prototype. Overflow diagrams can be shared via cloud. They can also be embedded, exported to PNG/PDF or printed. You can manage and organize Shares through the Dashboard. You can collaborate with your team through shared cloud space with a multi-seat organization.
Overflow is currently for macOS, with Windows support coming soon. Overflow cloud sharing is accessible by all major web browsers on desktop computers and mobile devices.