The best alternatives to MindPane are Miro, Zenkit, and Zen Flowchart. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of MindPane?
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The online collaborative whiteboard platform that enables distributed teams to work effectively together, from brainstorming with digital sticky notes to planning and managing agile workflows.
The project management tool that grows with you. Zenkit gives you the flexibility to create custom workflows, and the freedom to organize your data the way you want.
UPD' 2019: RealtimeBoard is now called Miro. Use Mind Map to visualize your thoughts. Brainstorm, plan projects, or take on more complex tasks like building story maps, roadmaps, or journey maps on the endless canvas with all the information in front of you.