I've been using Lucidchart for a year or so, now, and it has progressed pretty well. It has decent integration with Google Docs, too.

More than just mind maps, LucidChart makes it easy to collaborate on org charts, network diagrams, business processes, development workflows, and more.

To date, LucidChart has companies like Ericsson, Mozilla, CBS, Groupon, Google, Twitter, and Disney using its service. It has raised $1 million in funding from investors like 500 Startups, 2M ...