CardBoard allows teams to collaborate online and build whatever they can imagine. It is designed to be simple to use so you don't need to go through a ton of training. Get your whiteboard started quickly by using one of our built in templates. Hold your next retrospective or agile planning meeting with CardBoard. Try now for free => https://cardboardit.com
Xmind - Xmind is a brainstorming and mind mapping application.
Taiga - Project management platform for agile developers & designers
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
Plan.io - Planio makes web based project management and team collaboration more efficient and fun. It is the perfect platform for your projects, team members and clients.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
TargetProcess - Agile Project Management Web Application