Chose draw.io
I find Draw.io to be a happy medium between the options available. It doesn't quite offer the flexibility and power of Xmind or Visio, but it lives in the cloud and doesn't require software installations or similar hassles. The main contenders in my mind ended up being Lucidchar…
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