Ideaflip - If you are looking for a company that will help improve brainstorming, idea sharing, and refining, then Ideaflip mobile App is a great option.
Xmind - Xmind is a brainstorming and mind mapping application.
Mural - MURAL is a visual collaboration workspace for modern teams.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.