Affinity Publisher - Professional desktop publishing app
Xmind - Xmind is a brainstorming and mind mapping application.
Contenta Publishing Suite - Contenta Publishing Suite is an advanced-level and web-based publishing software solution offered by RWS that allows you to create good quality content and offers you optimized steps and procedures to publish the content successfully.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
RebelMouse - Publishing platform for distributed content
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.