What are some alternatives?
When comparing Stormboard and IPEVO Annotator, you can also consider the following products
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.
XMind - XMind is a brainstorming and mind mapping application.
Limnu - Sketch, share and collaborate with your team
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Invision - Prototyping and collaboration for design teams