Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Xmind - Xmind is a brainstorming and mind mapping application.
Invision - Prototyping and collaboration for design teams
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Sketch - Professional digital design for Mac.
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.