Xmind - Xmind is a brainstorming and mind mapping application.
PlanBox - Finally an agile management tool all teams can share, whether Scrum-savvy or not.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Crowdicity - Idea management software for smart organizations.
Brightidea - With over 2 million users worldwide and $15+ billion in recorded business impact, Brightidea is ranked as the #1 Idea Management Platform globally and is the market leader in innovation management.
Sideways 6 - Sideways 6 is the best way to involve your employees in innovation.