This web-based mind-mapping tool lets you collaborate and brainstorm with experts in real-time. Besides ideation and project planning, you can use this startup tool for creating presentations. Mindmeister allows you to turn mind-maps into dynamic slideshows.
Moreover, it integrates with MeisterTask – a task management tool – allowing you to turn your ideas into actionable tasks.
Basic version with up to 3 mind maps is available for free
Check it out here https://www.mindmeister.com/