Creately - The new interface for work to ideate, plan, and execute
Xmind - Xmind is a brainstorming and mind mapping application.
Cacoo - A cloud-based diagram maker for companies, teams, and you.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.