
Diagramiq is the perfect tool to capture and connect your ideas into beautiful diagrams with unbeatable speed and ease. It offers a great collection of shape libraries with virtually unlimited styling options, and with real time collaboration and integrated chat your whole team can work together on any project.
Have been using this ever since it got out of beta.
Really intuitive and fast, just wish mindmapping was on the table.
Overall, really recommend, especially when diagraming in a team.