I've long been a fan of Gliffy, a fantastic online diagram tool that's like Microsoft Visio in your browser, only free. Now it has a bit of competition in the form of LucidChart, a similar browser ...

1. To create a flow chart with Lucidchart, first, we need to add the Lucidchart add-on to Google Docs. To do that, click on the Extensions option in the menu bar.

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