LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
StorifyMe - Create amazing web story experiences and engage your audience outside of social media
draw.io - Online diagramming application
ShiftX - A user-friendly, drag-and-drop, process visualization tool with connected data.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Flowkit - Sketch library for user flows/content maps/annotations