Whimsical Mind Maps - Fast & beautiful mind maps with real-time collaboration
Zen Flowchart - The simplest tool to create flowcharts
Mind Map by RealtimeBoard - More than your average mind map
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
Scheme Flowcharts - A huge pack of layouts for UX prototyping
Whimsical Docs - Docs, flowcharts, wireframes, and mind maps in one place