Chose OmniGraffle
Omnigraffle handles flows and diagrams better than other tools I've listed above. However, Axure is far superior for creating wireframes and turning them into interactive prototypes (basically "coding" using if/then logic statements). Sketch is much better for detailed design …
Independently Invited by TrustRadius
A de minimis incentive was given to thank the reviewer for their time. The incentive was not used to bias or drive a particular response, nor was the incentive contingent on a positive endorsement. More Info