From Paterva dot com:
The Community Edition is limited in the following ways:
* A 15second nag screen
* Save and Export has been disabled
* Limited zoom levels
* Can only run transforms on a single entity at a time
* Cannot copy and paste text from detailed view
* Transforms limited to 75 per day
* Throttled client to TAS communication
http://www.paterva.com/maltego/community-edition/
