What are some alternatives?
XMind - XMind is a brainstorming and mind mapping application.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
Innovation Agora - ideas4all Innovation Agora is a suite that offers the most complete and flexible solution to manage innovation with different internal and external actors, in any sector.
Idea Market - Exago is collaborative idea management software that powers the business growth.