MindMeister is one of our favourite tools for creating mind maps on Google Drive. It provides users with an intuitive brainstorming platform where they can discuss projects, sketch out plans, and collaborate in real-time. With its integration with Google Drive, users are able to "open and edit many mind map formats such as MindManager, Freemind and XMind directly from their Google Drive, and even sync their entire maps list."
Via Gumersindo Fernández