UPDATE 2019: I updated the access details below. Also, if you work for a Fortinet partner you can request access to the demo
appliances via Partner's Portal.
As someone said best things in life are free. Here are links to the demo Forigate firewall, ForiAnalyzer and FortiManager open to access from anywhere . So that you can familiarize yourself with the Management GUI look and feel.
NOTE: Access is read-only.
NOTE 2: No , it is not me being so generous, it's Fortinet caring for us.